Fox Sparrow – LIFE IN THE LOWER SUSQUEHANNA RIVER WATERSHED

November 19, 2024November 22, 2024

Five Favorite Visitors from the Northern Forests

As the autumn bird migration draws to a close for 2024, we’re delighted to be finding five of our favorite visitors from the coniferous and mixed forests of Canada and the northernmost continental United States.

Male Yellow-bellied Sapsucker — Yellow-bellied Sapsuckers drill evenly spaced holes which they repeatedly visit to harvest “sap” and the insects that become trapped therein. These surgically small excavations penetrate only the bark and the phloem, a shallow, spongy layer of the trunk that carries sugars from the leaves to other parts of the tree. Seldom do they puncture the thin, underlying cambium layer which protects the true sapwood. After healing, sapsucker holes leave linear rows of small scars which are sometimes still discernible decades after a bird’s final visit. This adult male will probably linger in the Lower Susquehanna River Watershed until colder weather renders the tree totally dormant, the flow of “sap” ebbs, and small insects become harder to find. Then he’ll make his way off toward southern forests of oak and pine for the remainder of the winter. Sapsuckers work their way north as sugary “sap” begins flowing again in the spring.

The Hermit Thrush is another denizen of coniferous and mixed forests. In habitats with dense cover and sufficient food sources like fruit-bearing shrubs and vines, some will remain through the winter. The Hermit Thrush is the only spot-breasted thrush regularly seen in our region from November through March.

Almost the size of a thrush, the largest of our native sparrows, the Fox Sparrow, is currently at the peak of its southbound migration. While taking a break from their nocturnal flights, some may stray from forest edges to visit suburban feeding stations. Most leave our area by mid-December, then begin returning north as early as mid-February.

Not present every year, flocks of Pine Siskins are beginning to arrive in the lower Susquehanna region. They are currently most common along the mountain tops of the Ridge and Valley Province where they are feeding on the seeds of the Sweet Birch, a tree also known as Black Birch. Look for them around niger seed feeders and on the prickly seed balls of cultivated American Sweetgum, but don’t be surprised if they quickly pass us by to spend the winter on the Atlantic Coastal Plain to our south where this native tree grows in abundance.

Female/Juvenile Male Purple Finch — Since late October, Purple Finches have been widespread throughout the region. These female/juvenile male types are frequently being seen at feeders, particularly near woodlands and other areas with stands of conifers.

Male Purple Finch — Less frequently seen are the adult male Purple Finches in their raspberry-colored plumage. What a dandy.

While right now is the best time to get out and look for these species from the northern forests, any or all of them could linger into the winter months, particularly where the food supply is sufficient and conifers and other evergreens provide cover from the blustery weather.

November 14, 2023November 15, 2023

Sparrows in the Thicket

As the annual autumn songbird migration begins to reach its end, native sparrows can be found concentrating in fallow fields, early successional thickets, and brushy margins along forest edges throughout the Lower Susquehanna River Watershed.

Brushy Thicket — A streamside thicket composed of seed-producing grasses and wildflowers as well as fruit-bearing shrubs and vines can be ideal habitat for migrating and wintering native sparrows.

Visit native sparrow habitat during mid-to-late November and you have a good chance of seeing these species and more…

The Song Sparrow can be found in woody brush and grassy margins from the shores of the Susquehanna all the way up to the ridgetops of the Appalachians.

Dark-eyed junco — During the colder months of the year, the Dark-eyed Junco is a familiar visitor to bird-feeding stations. Where suitable natural cover is present, they regularly venture into suburban and urban settings.

The White-throated Sparrow is commonly found in the company of juncos, but is generally less adventurous, being more likely in weedy fields near young woodlands than in suburban gardens.

The Eastern Towhee is a large native sparrow most often found in early successional growth near woodlands. Look for them in utility right-of-ways.

If you’re lucky enough to live where non-native House Sparrows won’t overrun your bird feeders, you can offer white millet as a supplement to the wild foods these beautiful sparrows might find in your garden sanctuary. Give it a try!

December 14, 2021

Photo of the Day

Our largest sparrow, the Fox Sparrow, is an uncommon but regular late-autumn and early-spring migrant in the Lower Susquehanna River Watershed. Where there is dense cover among thickets, a few may remain through the winter.

March 20, 2020August 15, 2022

A Springtime Quiz

The mild winter has apparently minimized weather-related mortality for the local Green Frog population. With temperatures in the seventies throughout the lower Susquehanna valley for this first full day of spring, many recently emerged adults could be seen and, on occasion, heard. Yellow-throated males tested their mating calls—reminding the listener of the sound made by the plucking of a loose banjo string.

Here’s a gathering of Green Frogs seen this afternoon along the edge of a small pond. How many can you find in this photograph?

If you venture out, keep alert for the migrating birds of late winter and early spring.

Yellow-bellied Sapsuckers are moving through on their way north. Look for them in mature trees in woodlands, suburbs, and city parks.

The Fox Sparrow (Passerella iliaca), our largest sparrow, is a thrush-like denizen of shrubby forest understories and field edges. It is an early spring and late autumn transient in the lower Susquehanna valley.

While stopping to rest and feed during their northbound spring journey, Ring-necked Ducks and other diving duck species visit wetlands and flooded timber along the Susquehanna River as well as clear ponds and lakes elsewhere in the watershed.

Eastern Bluebirds are presently migrating through the area. Some will stay to breed where nest boxes or natural cavities are available in suitable habitat.

Tree Swallows are now arriving. In open grasslands, pastures, and adjacent to almost any body of water, they will nest in boxes like those placed for bluebirds.

Keep that bird bath clean and fill it with fresh water, the American Robin flights are peaking right now. Breeding males like this one are starting to sing and defend nesting territories.

Red-winged Blackbirds, like other native blackbirds, are moving through in a fraction of the numbers that were seen in the lower Susquehanna valley during the latter decades of the twentieth century. They remain a common breeding species in pastures and cattail wetlands.

And of course, keep an eye to the sky. There are still thousands of Snow Geese in the area.

If you’re staying close to home, be sure to check out the changing appearance of the birds you see nearby. Some species are losing their drab winter basic plumage and attaining a more colorful summer breeding alternate plumage.

European Starlings are losing their spotted winter (basic) plumage and beginning to display a glossy multicolored set of breeding feathers.

An American Goldfinch in transition from winter (basic) plumage to bright yellow, black, and white summer colors.

So just how many Green Frogs were there in that first photograph? Here’s the answer.

If you counted seven, you did really well. Numbers eight and nine are very difficult to discern.

Happy Spring. For the benefit of everyone’s health, let’s hope that it’s a hot and humid one!