Squirrels (Sciuridae) – LIFE IN THE LOWER SUSQUEHANNA RIVER WATERSHED

October 10, 2025

Changes Following the Season’s First Frost

Having experienced our first frost throughout much of the lower Susquehanna valley last night, we can look forward to seeing some changes in animal behavior and distribution in the days and weeks to come. Here are a few examples…

Unlike their close relatives the Tree Swallows, which include berries as well as invertebrates in their diet, Northern Rough-winged Swallows are strictly insectivores and will find it necessary to promptly move south to assure a frost-free environment where they can secure an adequate supply of food. Their one alternative: find a local sewage treatment plant where warm water attracts populations of flying insects through the remainder of autumn and maybe into winter.

Warblers too are insect eaters. Look for most of our dozens of species to evacuate the area in coming days and leave behind only the Yellow-rumped Warbler, another bird with a fondness for berries during cold weather. Into the winter months, they remain in small numbers in habitats with an abundant supply of berries like Poison Ivy, holly, wild grape, bittersweet, and Eastern Red Cedar. For lingering Yellow-rumped Warblers, thickets of cedars and other evergreens provide essential protection from frigid nighttime winds.

This Eastern Chipmunk will soon feel the pinch. Instead of eating the sweet, fruity portions of Mile-a-minute Weed berries, it’ll have to get serious about stocking its den with larger seeds, acorns, hickory nuts, and other foods to snack on through the winter. Better get busy, little friend!

June 4, 2025June 4, 2025

Soakin’ Up the Smoky Sun

With temperatures finally climbing to seasonable levels and with stormy sun filtering through the yellow-brown smoke coming our way courtesy of wildfires in Alberta and other parts of central Canada, we ventured out to see what might be basking in our local star’s refracted rays…

Dragonflies including this Black Saddlebags are now actively patrolling the edges of waterways and wetlands for prey and mates.

Here we see a pair of Common Green Darners flying in tandem…

A sunny day almost always brings out the reptiles, including these Painted Turtles…

and the invasive Red-eared Slider, a native transplant from the American midwest.

A really big Snapping Turtle will prey on almost anything, including other Snapping Turtles…

…but this one seems to be fascinated by something a lot smaller. Something like these juvenile Golden Shiners seen here schooling in the sun-drenched shallows.

Turtles aren’t the only reptiles thriving in the heat. Northern Water Snakes (Nerodia sipedon sipedon) take full advantage of a sun-drenched rock to warm up after spending time in the chilly water of a stream.

Butterflies like this Spicebush Swallowtail enjoy time in the sun, even while seeking out minerals in a patch of moist soil.

Woodchucks — After its siblings darted into the familial burrow upon our approach, this juvenile Woodchuck instead sought the attention of its nurturing mother. Unlike its brothers and sisters, perhaps this little groundhog isn’t afraid of its own shadow. Or does the smoky haze have the youngster all confused about what does and doesn’t constitute as a shadow? Well, we can’t help you there, but you have a whole eight months to figure it out!

March 23, 2025

Early-spring Maples: Clouds of Color Across the Forest Canopy

By late winter, sunshine and warming temperatures awaken the sleeping maples of the lower Susquehanna basin and the sap begins to flow. The new growing season is evident by the first days of spring when their swelling buds and flowers paint the drab gray canopy of deciduous woodlands with an overlying coat of red, orange, and maroon.

Red Maples in Early Spring — Red Maples, renowned for their vibrant autumn foliage, are just as conspicuous in the early spring landscape.

Eastern Gray Squirrel Feeding on Red Maple Buds — For birds and mammals like this Eastern Gray Squirrel, the buds and flowers of maples mean relief from the diminished natural food supplies that helped them survive winter’s worst. The season of abundance has arrived and these animals instantly recognize this source of sweet, fresh energy, just in time for the breeding season. The flowers of maples, which later in the spring yield those familiar helicopter-like seeds, are an important early season source of energy for many species of bees and other pollinators.

February 26, 2025August 4, 2025

Winter Survival: Generalists and Specialists

We’ve seen worse, but this winter has been particularly tough for birds and mammals in the Lower Susquehanna River Watershed. Due to the dry conditions of late summer and fall in 2024, the wild food crop of seeds, nuts, berries, and other fare has been less than average. The cold temperatures make insects hard to come by. Let’s have a look at how some of our local generalist and specialist species are faring this winter.

House Sparrows and a House Finch — House Sparrows (bottom) and House Finches (top) are generalists. To survive and thrive, they are adapted to a variety of habitats and types of food. House Sparrows live almost anywhere man-made structures are found. They are true omnivores and will eat almost anything, especially if they see something else try to eat it first. The House Sparrow’s close association with humans has allowed it to become the most widespread and successful living avian dinosaur. On a cold night, they’ll take shelter either within dense vegetation alongside a building or within the structure itself. Though not nearly as cosmopolitan, the House Finch has successfully colonized much of the eastern United States after escaping from captivity as a cage bird in New York during the middle of the twentieth century. Upon being trans-located here from the arid southwest, they adapted to suburbs and farmlands consuming primarily a granivore diet of seeds supplemented with seasonally available berries. They quickly became accustomed to offerings at bird-feeding stations as well. To survive the harsh winters in the northern sections of their range, eastern populations of House Finches are developing a pattern of migration. These movements are most evident in late fall when dozens or sometimes hundreds can be seen heading south over regional hawk-counting stations.

Northern Flicker feeding on Poison Ivy — Though they require dead trees for nesting and as places to find the grubs and adult insects upon which they primarily feed, woodpeckers including the Northern Flicker are generalists, seldom passing by a supply of fruits like these Poison Ivy berries as a source of winter food. Flickers regularly visit suburban areas where they’ll drop by at bird-feeding stations for suet. During the warmer months, they are the woodpecker most frequently seen on the ground where swarms of ants garner their full attention.

The Pileated Woodpecker is seldom found outside of mature forests where it digs relentlessly to remove grubs and other infestations from dead wood. But it is not a true specialist…

Pileated Woodpecker eating Poison Ivy — …it too finds a supply of Poison Ivy berries to be indispensable during a cold winter day.

The Ruby-crowned Kinglet is a generalist, feeding mostly on insects, but also consuming small seeds and some berries, including those of Poison Ivy. It nests well to our north in tall spruces and other evergreens. During migration and in winter, the Ruby-crowned Kinglet may be found in deciduous trees, brush, and tall grass in habitats ranging from forests to parks and suburbia. This male is displaying its seldom-seen red crown.

The Golden-crowned Kinglet, seen here on a Poison Ivy vine, is more of a specialist than the Ruby-crowned species, though the two will often occur in mixed groups during the winter. The Golden-crowned Kinglet nests in Spruce-Fir forests and in conifers within mixed woodlands. Even during migration, and particularly in winter, these birds are seldom found far from a stand of large evergreens within which they find shelter for the night.

The Hermit Thrush’s generalist lifestyle allows it to survive cold season weather in the Lower Susquehanna River Watershed. During summer, it breeds in coniferous and mixed woods from the northern parts of our valley north into Canada and feeds primarily on worms, insects, and other arthropods. During migration and in winter, the Hermit Thrush becomes a regular visitor to deciduous forests, woody parks and suburbs, particularly where a supply of wild berries is available to supplement its diet.

Iconic as it pulls earthworms from lawns during the warmer months, the generalist American Robin is fully dependent upon a crop of berries to survive winter conditions in the lower Susquehanna valley. The drought afflicted wild food crop of 2024 has led to fewer robins spending the season here and has delayed the northward push of migrating birds until the ground thaws and the earthworms make the ground rumble once again.

It’s insects for the nestlings during spring and summer, then berries through the winter for the cheerful Eastern Bluebirds, another generalist species.

American Crows are an excellent example of a generalist species. They’ll go anywhere to find food and they’ll eat almost anything. Like the House Sparrow and several other generalists, they adapt very well to human activity and actually thrive on it. Garbage anyone?

Another career generalist is the widely worshiped White-tailed Deity, a species adapted to nearly all man-made landscapes with adequate vegetation upon which to browse. Pushed to the limit during severe weather, some individuals will consume carrion and even resort to cannibalism.

You might think the Great Blue Heron is a specialist. Nope, it’s an accomplished generalist. Great blues will live, feed, and breed on almost any body of fresh or brackish water. And their diet includes almost anything that swims. In winter, you’ll even see them in fields hunting mice and voles.

The Red-shouldered Hawk is a generalist with a diet ranging from amphibians and reptiles to small rodents and large insects. Mostly regarded as a species of bottomlands, they’ll frequent woodland edges, roadsides, and suburbia during the winter months.

During its periodic winter visits to the region, the American Tree Sparrow feeds on seeds among the grasses and forbs of semi-open country with scattered short shrubs and trees. A generalist species, it will show up at backyard bird-feeding stations, particularly during periods of inclement weather. In summer, the American Tree Sparrow nests in tundra with growths of stunted willows and spruce and their diet includes insects as a source of protein for themselves and their young.

The White-crowned Sparrow has similar winter habitat preferences to the tree sparrows…

White-crowned Sparrows — …it becomes adaptable and something of a generalist when searching for food during bad winter storms.

The Savannah Sparrow is an omnivore favoring insects in summer and seeds in winter. Though very closely tied to its grassland habitat year-round, snow cover can push these birds to enter woodier environs to consume fruits like these rose hips.

Dusk and dawn during the short days of winter are the prime hunting times of a mammal specialist, the Short-eared Owl. Its presence in the lower Susquehanna valley is dependent on two dominant factors: extensive grassland habitat and an adequate population of the owl’s favored food, the Meadow Vole (Microtus pennsylvanicus). The Short-eared Owl’s requirements as a specialist species make finding a suitable place to live difficult. Unlike the generalist birds and mammals that often adapt to the widespread man-made disturbances in the region, populations of specialists frequently become fragmented, reduced in abundance, and subject to extirpation.

The Meadow Vole is a generalist rodent that can be abundant in grasslands, early successional growth, fallow fields, marshlands, and, of course, meadows. They are primarily herbivores, but will occasionally consume insects and other arthropods. Usually nocturnal, some individuals venture out along their surface runways during daylight hours becoming vulnerable to diurnal raptors including kestrels, harriers, and buteos.

Short-eared Owl patrolling a grassland for Meadow Voles — A Short-eared Owl in near darkness patrolling a grassland for Meadow Voles.

The eastward expansion of the Coyote (Canis latrans), a species of western North America’s grasslands and scrublands, and its progressive mixing with the Wolf (Canis lupus) in these eastern extensions of its range, has produced an expanding population of very adaptable generalists we call Eastern Coyotes (Canis latrans var.). These omnivorous canines colonized the Lower Susquehanna River Watershed during the last four decades to replace extirpated wolves as the top-tier natural predator in the region. Their primary diet includes Meadow Voles in grasslands and other small mammals along woodland edges and in successional habitats. Seasonally, they consume the berries of numerous wild plants. Slightly larger than their western ancestors, Eastern Coyotes with the admixture of Wolf genetics can subdue small ungulates. Like other apex predators, they are attracted to vulnerable prey and thus play a crucial role in culling the weak and diseased among their potential quarry species to assure the health and potential of populations of these species as long-term sources of food energy. The benefit to the prey species is however largely diluted in populous areas of the northeast; most venison consumed by Eastern Coyotes here is in the form of road kill. During periods of extended snow cover when small rodents and other foods become inaccessible, Eastern Coyotes, particularly young individuals, will wander into new areas seeking sustenance. Sometimes they venture into cities and suburbs where they explore the neighborhoods in search of garbage and pet foods placed outside the home. (Video clip courtesy of Tyler and Grace Good. Click image to view.)

Wildlife certainly has a tough time making it through the winter in the lower Susquehanna valley. Establishing and/or protecting habitat that includes plenty of year-round cover and sources of food and water can really give generalist species a better chance of survival. But remember, the goal isn’t to create unnatural concentrations of wildlife, it is instead to return the landscape surrounding us into more of a natural state. That’s why we try to use native plants as much as possible. And that’s why we try to attract not only a certain bird, mammal, or other creature, but we try to promote the development of a naturally functioning ecosystem with a food web, a diversity of pollinating plants, pollinating insects, and so on. Through this experience, we stand a better chance of understanding what it takes to graduate to the bigger job at hand—protecting, enhancing, and restoring habitats needed by specialist species. These are efforts worthy of the great resources that are sometimes needed to make them a success. It takes a mindset that goes beyond a focus upon the welfare of each individual animal to instead achieve the discipline to concentrate long-term on the projects and processes necessary to promote the health of the ecosystems within which specialist species live and breed. It sounds easier than it is—the majority of us frequently become distracted.

Being an individual from a population of a very successful generalist species is no guarantee of survival. This Eastern Gray Squirrel fell from a tall tree when the limbs became ice covered during a storm earlier this month. Just a freak accident? Maybe, but mistakes like this are often fatal in the natural world. This squirrel’s passing may seem brutal, but it provides a better opportunity for other squirrels and animals that share its food and cover requirements to make it through the winter. And those survivors that didn’t suffer such a fatal mistake or, more importantly, don’t possess a vulnerability that may have contributed to such a mishap will have a chance to pass those traits on to a new generation. This squirrel as an individual is gone, its species lives on, and may be stronger for its passing.

Prescribed Burn of a Grassland — Pennsylvania Game Commission crews maintain a grassland ecosystem for Short-eared Owls and other specialists using prescribed fire to prevent succession beyond its earliest stages. Among the additional specialist species benefiting from this management tool are Monarchs and other butterflies whose host plants survive early-season fire, but not competition with woody vines, shrubs, trees, and invasive herbaceous growth.

On the wider scale, it’s of great importance to identify and protect the existing and potential future habitats necessary for the survival of specialist species. And we’re not saying that solely for their benefit. These protection measures should probably include setting aside areas on higher ground that may become the beach intertidal zone or tidal marsh when the existing ones become inundated. And it may mean finally getting out of the wetlands, floodplains, and gullies to let them be the rain-absorbing, storm-buffering, water purifiers they spent millennia becoming. And it may mean it’s time to give up on building stick structures on tinderbox lands, especially hillsides and rocky outcrops with shallow, eroding soils that dry to dust every few years. We need to think ahead and stop living for the view. If you want to enjoy the view from these places, go visit and take plenty of pictures, or a video, that’s always nice—then live somewhere else. Each of these areas includes ecosystems that meet the narrow habitat requirements of many of our specialist species, and we’re building like fools in them. Then we feign victimhood and solicit pity when the calamity strikes: fires, floods, landslides, and washouts—again and again. Wouldn’t it be a whole lot smarter to build somewhere else? It may seem like a lot to do for some specialist animals, but it’s not. Because, you see, we should and can live somewhere else—they can’t.

The Allegheny Woodrat (Neotoma magister), a threatened species in Pennsylvania and a critically imperiled species in Maryland, is a habitat specialist requiring the forested rocky slopes, talus-flanked ridgetops, and caves of the Ridge and Valley Province for its nest sites and survival. Isolated populations survived within similar environs in the lower Susquehanna River valley’s Piedmont Province and on South Mountain through at least the first half of the twentieth century, but have since been extirpated. Human encroachment that fragments their habitat and promotes exposure to parasite-hosting mammals including the Raccoon (*Procyon lotor)*, carrier of the Raccoon Roundworm (Baylisascarius procyonis), could prove fatal to remaining populations of this native mammal. (National Park Service image by Rick Olsen)

The American Oystercatcher (Haematopus palliatus) is a specialist species that uses its highly adapted bill to feed on marine invertebrates including mollusks, few of which are actually oysters. Reliant upon tidal ecosystems for its survival, many of the seashore animals that make up this wader’s diet are themselves specialist species. Oystercatchers spend nearly their entire lives in tidal marshes or within the intertidal zone on beaches. They also frequent rocky jetties, particularly during high tide. This individual was photographed near the mouth of Chesapeake Bay in Northhampton County, Virginia, a location that, when the waters of the Atlantic started rising over 10,000 years ago, was the lower Susquehanna valley about 60 miles from the river’s mouth at present-day Norfolk Canyon along the edge of the continental shelf. Get the drift?

February 10, 2025February 11, 2025

Groundhog Stew

Our procrastinating groundhog

Susquehanna Stew

Is out to have a look around

Eight days overdue

Nibbling on some morsels

Basking in the sun

Almost three months since his last meal

Gee, that must be fun

But eating dried-up grasses

Might not do the trick

He might start feeling woozy

Or even getting sick

All this nonstop grazing

Stew’s just like a cow

He needs to find a way to stop

And end this binge right now

So when he saw his shadow

He knew just what to do

Time to head down under

‘Til wintertime is through

This crazy superstition

Sure did take its toll

The situation’s urgent

He’s headed for his hole

But Stew’s no fan of digging

Or all that woodchuck hype

This marmot has no burrow

His home’s a broken pipe

So if you want to see him

In springtime when it rains

Keep an eye on the clover field

Outside the flooding drains

Always a great time Stew. See you in the spring. And remember, it’s never a good idea to be late for dinner, so stay away from the carrots, celery, potatoes, and onions—someone may get the wrong idea!

December 18, 2024December 19, 2024

Seven Reasons to Visit Middle Creek’s Willow Point Right Now

Here are 7 reasons why you, during the coming week or so, should consider spending some time at Willow Point overlooking the lake at the Pennsylvania Game Commission’s Middle Creek Wildlife Management Area.

REASON NUMBER ONE— Wildlife is at close quarters along the trail leading from the parking lot to Willow Point…

Look carefully and you may see one or more species of woodpeckers in the mature trees. We found this Yellow-bellied Sapsucker in a maple near the trail’s terminus at the Willow Point viewing area.

REASON NUMBER TWO— A variety of waterfowl species are lingering on ice-free sections of the lake surrounding Willow Point…

Noisy flocks of Tundra Swans and Canada Geese on open water at Willow Point.

Mallards — Mallard drakes near the point.

A small flock of Green-winged Teal feeding among the Mallards.

A flock of Northern Shovelers has been frequenting the shallows along the south side of Willow Point for at least two weeks.

Common Mergansers diving for benthic fare.

REASON NUMBER THREE— Bald Eagles are conspicuous, easily seen and heard…

REASON NUMBER FOUR— Northern Harriers have been making close passes over Willow Point as they patrol Middle Creek’s grasslands while hunting voles…

REASON NUMBER FIVE— The annual observance of the White-tailed Deity holidays may be drawing to a close for the gasoline and gunpowder gang, but for the supreme ungulates, the rituals that lead to consummation of their unions are still ongoing…

REASON NUMBER SIX— Sandhill Cranes are still being seen from Willow Point…

REASON NUMBER SEVEN— The crowds that will accompany the arrival of thousands of Snow Geese in early 2025 can make visiting Willow Point a stressful experience. Visit now to see these birds and mammals at Willow Point and you might just have the place all to yourself. Then you can spend your time looking through the flocks of waterfowl and other birds for unusual new arrivals instead of wading through a sea of humanity.

November 27, 2024November 30, 2024

Nothing But Leftovers?

If you provide supplemental foods for the birds visiting your garden sanctuary, we don’t need to tell you how expensive those provisions have become. It can be quite frustrating when the majority of these pricey supplies get gobbled up by the chunky squirrels that dominate your feeding station and leave hungry birds with nothing but the tiny little scraps.

Here at susquehannawildlife.net headquarters, we like to feed whole peanuts in the shell to the resident and migratory native birds. But placed out in the open on a stump or a tray, or even within a hopper feeder, peanuts are quickly carried away and cached for latter use by squirrels and jays. The chickadees, titmice, nuthatches, wrens, and woodpeckers that could really use the extra food to maintain their body fat through the winter get nothing but leftovers.

It’s not unusual for squirrels and jays to scarf up and carry away 90% or more of the expensive peanuts placed at your feeding station. The dozen or more other species of native birds that will partake of this offering get the leftovers or nothing at all.

We’ve discovered a solution that, for us, saves money and more efficiently feeds the native species of birds that stop by our oasis. We’ve been using inexpensive ($6-$8) wire mesh tube feeders intended for suet nuggets to serve whole peanuts in the shell to our guests. As long as they can’t knock the feeders to the ground, squirrels have failed to raid the contents. Like other birds, Blue Jays can still peck away to remove the peanuts from their shells and eat them on the spot, but they can no longer haul off a whole feeder load at a time. Each must carefully crack the shell and remove an individual peanut or portion thereof for immediate consumption. The empty shells remain mostly in the tubes and don’t make a mess. Pesky hoards of non-native European Starlings sometimes visit, but soon become frustrated because their bills aren’t adapted for cracking the hardened peanut husks; they grab any loose morsels they can get, then move along.

Suet Nugget Feeders — We assemble these suet nugget feeders without installing the included perches. We fill them with UNSALTED peanuts in the shell, then hang them from stiff wire hooks beneath the larger horizontal limbs on some of our trees. About every 5 to 10 days, we take them down to remove empty shells, clean the feeder, and add peanuts. A 2-pound bag that would disappear within hours if freely accessible to squirrels now fills 3 feeders or more and nourishes our native birds for a week or longer.

The list of native birds visiting our peanut feeders includes:

Downy Woodpecker

Hairy Woodpecker

Red-bellied Woodpecker

Northern Flicker

Yellow-bellied Sapsucker

Blue Jay

Carolina Chickadee

Black-capped Chickadee

Tufted Titmouse

White-breasted Nuthatch

Red-breasted Nuthatch

Carolina Wren

So don’t pay hard-earned cash to feed nothing but leftovers to your intended guests, give wire mesh tube feeders and whole peanuts in the shell a try. The colorful native birds will thank you with their presence.

November 21, 2024November 21, 2024

Photo of the Day

June 23, 2024June 23, 2024

It’s Been a Stinkin’ Hot Week

Turkey Vulture and Road-killed Woodchuck — …but the stench would have been a lot worse without our friendly neighborhood scavengers around to clean up our mess. Turkey Vultures thrive in scorching temperatures, riding thermal updrafts to patrol the countryside for roadkill victims like this unfortunate Woodchuck.

May 8, 2024May 14, 2024

A Pre-dawn Thunderstorm and a Fallout of Migrating Birds

In recent days, the peak northbound push of migratory birds that includes the majority of our colorful Neotropical species has been slowed to a trickle by the presence of rain, fog, and low overcast throughout the Mid-Atlantic States. Following sunset last evening, the nocturnal flight resumed—only to be grounded this morning during the pre-dawn hours by the west-to-east passage of a fast-moving line of strong thundershowers. The NOAA/National Weather Service images that follow show the thunderstorms as well as returns created by thousands of migrating birds as they pass through the Doppler Radar coverage areas that surround the lower Susquehanna valley.

Sterling, Virginia, Doppler Radar west of Washington, D.C., at 4:00 A.M. E.D.T. indicates a dense flight of northbound migrating birds located just to the south of the approaching line of rain and thunderstorms over the State College, Pennsylvania, radar coverage area. (NOAA/National Weather Service image)

More northbound birds are indicated at 4 A.M. by the radar station located at Dover, Delaware… (NOAA/National Weather Service image)

…and by the Mount Holly, New Jersey, radar site. (NOAA/National Weather Service image)

Many of the migrating birds shown here over the Binghamton, New York, radar station at 4 A.M. probably overflew the lower Susquehanna region earlier in the night. (NOAA/National Weather Service image)

And these birds over Albany, New York’s, radar station at 4 A.M. are mostly migrants that passed north over New Jersey and easternmost Pennsylvania last evening and during the wee hours of this morning. (NOAA/National Weather Service image)

Just after 4 A.M., flashes of lightning in rapid succession repeatedly illuminated the sky over susquehannawildlife.net headquarters. Despite the rumbles of thunder and the din of noises typical for our urban setting, the call notes of nocturnal migrants could be heard as these birds descended in search of a suitable place to make landfall and seek shelter from the storm. At least one Wood Thrush and a Swainson’s Thrush (Catharus ustulatus) were in the mix of species passing overhead. A short time later at daybreak, a Great Crested Flycatcher was heard calling from a stand of nearby trees and a White-crowned Sparrow was seen in the garden searching for food. None of these aforementioned birds is regular here at our little oasis, so it appears that a significant and abrupt fallout has occurred.

Looks like a good day to take the camera for a walk. Away we go!

Along woodland edges, in thickets, and in gardens, Gray Catbirds were everywhere today. We heard and/or saw hundreds of them.

During our travels, American Redstarts were the most frequently encountered warbler. Look for them in low-lying forested habitats.

Many early-arriving Baltimore Orioles have already begun building nests. But widespread territorial fighting today may be an indication that some latecomer orioles became trespassers after dropping in on existing territories during the morning fallout.

Red-eyed Vireos are difficult to see but easily heard in forested areas throughout the Lower Susquehanna River Watershed.

If the oriole isn’t the showiest of the Neotropical migrants, then the Scarlet Tanager is certainly a contender…

No woodland chorus is complete without the flute-like harmony of the Wood Thrush. Look and listen for them in rich forests with dense understory vegetation.

The Eastern Wood-Pewee, another forest denizen, has an easy song to learn…a series of ascending “pee-a-wee” phrases interspersed with an occasional descending “pee-urr”. It was one of the few flycatchers we found today, but more are certainly on the way. Their numbers should peak in coming days.

If today you were to visit a streamside thicket or any type of early successional habitat, you would probably find this perky little warbler there, the Common Yellowthroat.

The Yellow Warbler likes streamside thickets too. You can also find them along lakes, ponds, and wetlands, especially among shrubby willows and alders.

Not all songbirds migrate at night. The Bobolink is an example of a diurnal (day-flying) migrant. They’re currently arriving in hay fields that are spared the mower until after nesting season.

While looking for Neotropical species and other late-season migrants, we also found numerous early arrivals that had already begun their breeding cycles. We discovered this Blue-gray Gnatcatcher on its nest in a Black Walnut tree…

There’s obviously more spring migration to come, so do make an effort to visit an array of habitats during the coming weeks to see and hear the wide variety of birds, including the spectacular Neotropical species, that visit the Lower Susquehanna River Watershed each May. You won’t regret it!

Wood Ducks arrived in February and March to breed in the lower Susquehanna valley. Soon after hatching in April or May, the young leave the nest cavity to travel under the watchful gaze of their ever-vigilant mother as they search for food along our local waterways. If you’re fortunate, you might catch a glimpse of a brood and hen while you’re out looking at the more than one hundred species of birds that occur in our region during the first half of May. Good luck!

January 26, 2024January 26, 2024

The Fog of a January Thaw

As week-old snow and ice slowly disappears from the Lower Susquehanna River Watershed landscape, we ventured out to see what might be lurking in the dense clouds of fog that for more than two days now have accompanied a mid-winter warm spell.

York Haven Dam Powerhouse — After freezing to a slushy consistency earlier this week, the Susquehanna is already beginning to thaw. Below the York Haven Dam at Conewago Falls, the water is open and ice-free.

Mallards and a pair of American Wigeon on a frozen lake. — On frozen man-made lakes and ponds, geese and ducks like these Mallards and American Wigeon are presently concentrated around small pockets of open water.

American Robin in a Callery pear — During the past ten days, American Robin numbers have exploded throughout the lower Susquehanna valley. The majority of these birds may be a mix of both those coming south to escape the late onset of wintry conditions to our north and those inching north into our region as early spring migrants.

Cooper's Hawk — A visit by this young Cooper’s Hawk to the susquehannnawildlife.net headquarters garden sent songbirds scrambling…

But earlier in the week, when heavy snow cover in the rural areas surrounding our urbanized neighborhood made it difficult for rodent-eating raptors to find food, we received brief visits from both a Red-tailed Hawk…

Red-shouldered Hawk in flight. — Unimpressed, each of our visiting buteos remained for just a few minutes before moving on in search of more favorable hunting grounds and prey.

Early Successional Growth — As snow melted and exposed bare ground in fields of early successional growth, we encountered…

Adult Male Northern Harrier — What could be more appropriate on a foggy, gray evening than finding a “gray ghost” (adult male Northern Harrier) patrolling the fields in search of mice and voles.

If scenes of a January thaw begin to awaken your hopes and aspirations for all things spring, then you’ll appreciate this pair of closing photographs…

Pileated Woodpecker in Silver Maple — The maroon-red flower buds of Silver Maples are beginning to swell. And woodpeckers including Pileated Woodpeckers are beginning to drum, a timber-pounding behavior they use to establish breeding territories in habitats with suitable sites for cavity nesting.

In wet soil surrounding spring seeps and streams, Skunk Cabbage is rising through the leaf litter to herald the coming of a new season. Spring must surely be just around the corner.

November 23, 2023

Time to Eat

A glimpse of the rowdy guests crowding the Thanksgiving Day dinner table at susquehannawildlife.net headquarters…

A male White-breasted Nuthatch visits a peanut feeder…

A male Downy Woodpecker gets a bill full of suet.

A territorial Northern Mockingbird stands guard over its supply of Common Winterberry fruit.

To avoid the mockingbird’s aggression, the Eastern Bluebirds opted out of fresh fruit in favor of raisins offered at the feeders.

After everyone has had their fill, Dark-eyed Juncos clean up the leftovers.

June 23, 2023June 23, 2023

Peanuts! Get Your Peanuts!

Red-bellied Woodpecker on Peanut Feeder — Don’t want to feed suet to the birds around your home during the blazing heat of summer? Well, you might be glad to know that peanuts offered in one of these expanded metal tube feeders make a great substitute. They provide a nutritious supplement to naturally occurring foods for nuthatches, chickadees, Tufted Titmice, Carolina Wrens, Blue Jays, finches, and woodpeckers including this Red-bellied Woodpecker. Secured to a vertical length of wire hung from a horizontal tree limb, these feeders have proven so puzzling to the squirrels at susquehannawildlife.net headquarters that they no longer make any effort to raid them.

Though marketed primarily to dispense suet nuggets, powder-coated metal mesh feeders can be used for sunflower seeds too. This juvenile House Finch plucks the black oil variety from one of the tubes in our garden. Seeds that fall are quickly scarfed up by ground-feeding species including Northern Cardinals, Eastern Chipmunks (Tamias striatus), and frustrated squirrels. Fewer seeds are lost if the larger varieties of sunflower such as “grey stripe” are used.

April 16, 2023April 17, 2023

Photo of the Day

Three young Eastern Gray Squirrels investigate the world outside the nest cavity that has been their home since birth.

February 2, 2023

Photo of the Day

November 26, 2022September 13, 2023

The Gasoline and Gunpowder Gang’s Second-biggest Holiday of the Year

For members of the gasoline and gunpowder gang in Pennsylvania, the coming two weeks are the second-biggest holiday of the year. Cloaked in ceremonial orange, worshipers of the White-tailed Deity are making their annual pilgrimage into the great outdoors to beat the bushes in search of their idol. For the fortunate among the faithful, their devotion culminates in a testosterone/adrenaline-charged sacrifice of the supreme being.

Remember, emotions run high during this blood-letting festival—sometimes overwhelming secular attributes like logic and rational decision-making. You don’t want to be in the crossfire—so stay out of the woods!

February 19, 2022

Photo of the Day

Mammals of the Lower Susquehanna River Watershed: Eastern Gray Squirrel — An Eastern Gray Squirrel turns its back on today’s gusty snow squall.

January 29, 2022August 15, 2022

Five Best Values for Feeding Birds

Despite being located in an urbanized downtown setting, blustery weather in recent days has inspired a wonderful variety of small birds to visit the garden here at the susquehannawildlife.net headquarters to feed and refresh. For those among you who may enjoy an opportunity to see an interesting variety of native birds living around your place, we’ve assembled a list of our five favorite foods for wild birds.

American Goldfinches in drab winter (basic) plumage visit the trickle of water entering the headquarters pond to bathe and drink. In addition to offering the foods animals need to survive, a source of clean water is an excellent way to attract wildlife to your property.

The selections on our list are foods that provide supplemental nutrition and/or energy for indigenous species, mostly songbirds, without sustaining your neighborhood’s non-native European Starlings and House Sparrows, mooching Eastern Gray Squirrels, or flock of ecologically destructive hand-fed waterfowl. We’ve included foods that aren’t necessarily the cheapest but are instead those that are the best value when offered properly.

Bread, “bargain” seed mixes, and cracked corn can attract and sustain large numbers of House Sparrows and European Starlings. Both are non-native species that compete mercilessly with indigenous birds including bluebirds for food and nesting sites. Though found favorable for feeding Northern Cardinals without attracting squirrels, the expensive safflower seed seen here is another favorite of these aggressive House Sparrows. Ever wasteful, they “shovel” seed out of feeders while searching for the prime morsels from which they can easily remove the hulls. Trying not to feed them is an ongoing challenge, so we don’t offer these aforementioned foods to our avian guests.

Number 5

Raw Beef Suet

In addition to rendered beef suet, manufactured suet cakes usually contain seeds, cracked corn, peanuts, and other ingredients that attract European Starlings, House Sparrows, and squirrels to the feeder, often excluding woodpeckers and other native species from the fare. Instead, we provide raw beef suet.

Because it is unrendered and can turn rancid, raw beef suet is strictly a food to be offered in cold weather. It is a favorite of woodpeckers, nuthatches, and many other species. Ask for it at your local meat counter, where it is generally inexpensive.

Raw beef suet is fat removed from areas surrounding the kidneys on a beef steer. To avoid spoiling, offer it only in the winter months, particularly if birds are slow to consume the amount placed for them. If temperatures are above freezing, it’s important to replace uneaten food frequently. The piece seen here on the left was stored in the freezer for almost a year while the rancid piece to the right was stored in a refrigerator at about 40 degrees Fahrenheit for just two months. You can render raw beef suet and make your own cakes by melting it down and pouring it into a form such as cupcake tin. But do it outdoors or you’ll be living alone for a while.

A female Downy Woodpecker feeds on raw beef suet stuffed into holes drilled into a vertically hanging log. Because they can’t be cleaned, log feeders should be discarded after one season. Wire cage feeders though, can usually be scrubbed, disinfected, dried, and reused.

Pesky European Starlings might visit a raw beef suet feeder but won’t usually linger unless other foods to their liking are available nearby.

This male Downy Woodpecker has no trouble feeding on raw beef suet packed into holes drilled into the underside of this horizontally hanging log. Starlings don’t particularly care to feed this way.

Unusual visitors like a Brown Creeper are more likely to stop by at a suet feeder when it isn’t crowded by raucous starlings, House Sparrows, and squirrels. This one surprised us just this morning.

Below the feeders, scraps of suet that fall to the ground are readily picked up, usually by ground-feeding birds. In this instance, a male Eastern Bluebird saw a chunk break loose and pounced on it with haste.

Number 4

Niger (“Thistle”) Seed

Niger seed, also known as nyjer or nyger, is derived from the sunflower-like plant Guizotia abyssinica, a native of Ethiopia. By the pound, niger seed is usually the most expensive of the bird seeds regularly sold in retail outlets. Nevertheless, it is a good value when offered in a tube or wire mesh feeder that prevents House Sparrows and other species from quickly “shoveling” it to the ground. European starlings and squirrels don’t bother with niger seed at all.

Niger seed must be kept dry. Mold will quickly make niger seed inedible if it gets wet, so avoid using “thistle socks” as feeders. A dome or other protective covering above a tube or wire mesh feeder reduces the frequency with which feeders must be cleaned and moist seed discarded. Remember, keep it fresh and keep it dry!

Niger (“thistle”) seed is very small, so it is offered in specialized feeders to prevent seed from spilling out of oversize holes as waste.

An American Goldfinch in winter plumage feeding on niger seed from a wire mesh feeder. By April, goldfinches are molting into spectacular breeding feathers. Niger seed can be offered year-round to keep them visiting your garden while they are at maximum magnificence.

American Goldfinches in August. This tube feeder is designed specifically for goldfinches, birds that have no difficulty hanging upside down to grab niger seed from small feeding ports.

During invasion years, visiting Pine Siskins favor niger seed at feeding stations.

Like goldfinches, Pine Siskins are quite comfortable feeding upside down on specialized tubes with perches positioned above the seed ports. Seeds dropped to the ground are readily picked up by ground-feeding birds including Mourning Doves and Dark-eyed Juncos. Periodically, uneaten niger seed should be swept up and discarded.

Number 3

Striped Sunflower Seed

Striped sunflower seed, also known as grey-striped sunflower seed, is harvested from a cultivar of the Common Sunflower (Helianthus annuus), the same tall garden plant with a massive bloom that you grew as a kid. The Common Sunflower is indigenous to areas west of the Mississippi River and its seeds are readily eaten by many native species of birds including jays, finches, and grosbeaks. The husks are harder to crack than those of black oil sunflower seed, so House Sparrows consume less, particularly when it is offered in a feeder that prevents “shoveling”. For obvious reasons, a squirrel-proof or squirrel-resistant feeder should be used for striped sunflower seed.

A male House Finch and a Carolina Chickadee pluck striped sunflower seeds from a squirrel-resistant powder-coated metal-mesh tube feeder.

An American Goldfinch in winter plumage finds striped sunflower seeds irresistible, even with niger seed being offered in an adjacent feeder.

A Tufted Titmouse visits a feeder stocked with striped sunflower seeds.

Northern Cardinals readily feed on striped sunflower seeds, especially those that fall from our metal-mesh tube feeders.

An Eastern Gray Squirrel (*Sciurus carolinensis*) has no choice but to be satisfied with striped sunflower seeds that spill from our wire-mesh tube feeders.

Number 2

Mealworms

Mealworms are the commercially produced larvae of the beetle Tenebrio molitor. Dried or live mealworms are a marvelous supplement to the diets of numerous birds that might not otherwise visit your garden. Woodpeckers, titmice, wrens, mockingbirds, warblers, and bluebirds are among the species savoring protein-rich mealworms. The trick is to offer them without European Starlings noticing or having access to them because European Starlings you see, go crazy over a meal of mealworms.

A male Eastern Bluebird tossing and grabbing a dried mealworm.

A female Eastern Bluebird with a dried mealworm.

A pair of Eastern Bluebirds. The value of mealworms is self-evident: you get to have bluebirds around.

To foil European Starlings, we assembled this homemade mealworm feeder from miscellaneous parts. The bluebirds took right to it.

It frustrates the starlings enough to discourage them from sticking around for long.

If you’re offering dried mealworms, a source of clean water must be available nearby so that the bluebirds and other guests at your feeder don’t become dehydrated.

Number 1

Food-producing Native Shrubs and Trees

The best value for feeding birds and other wildlife in your garden is to plant food-producing native plants, particularly shrubs and trees. After an initial investment, they can provide food, cover, and roosting sites year after year. In addition, you’ll have a more complete food chain on a property populated by native plants and all the associated life forms they support (insects, spiders, etc.).

In your garden, a Northern Mockingbird may defend a food supply like these Common Winterberry fruits as its sole means of sustenance for an entire winter season. Having an abundance of plantings assures that in your cache there’s plenty to eat for this and other species.

The American Goldfinches currently spending the winter at our headquarters are visiting the feeders for niger and striped sunflower seeds, but the bulk of their diet consists of tiny seeds from the cones on our Eastern Hemlock trees. At night, birds obtain shelter from the weather by roosting in this clump of evergreens.

While the Eastern Bluebirds visiting the susquehannawildlife.net headquarters are fond of mealworms, the bulk of their diet here consists of these Common Winterberry fruits and the berries on our American Holly trees.

Cedar Waxwings are readily attracted to red berries including Common Winterberry fruit.

Migrating American Robins visit the headquarters garden in late winter each year to devour berries before continuing their journey to the north.

Your local County Conservation District is having its annual spring tree sale soon. They have a wide selection to choose from each year and the plants are inexpensive. They offer everything from evergreens and oaks to grasses and flowers. You can afford to scrap the lawn and revegetate your whole property at these prices—no kidding, we did it. You need to preorder for pickup in the spring. To order, check their websites now or give them a call. These food-producing native shrubs and trees are by far the best bird feeding value that you’re likely to find, so don’t let this year’s sales pass you by!

October 12, 2021October 12, 2021