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LIFE IN THE LOWER SUSQUEHANNA RIVER WATERSHED

A Natural History of Conewago Falls—The Waters of Three Mile Island

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Posted on March 17, 2025March 17, 2025 by L. L. Coble

They Go Together Like Corned Beef and Cabbage

Red-winged Blackbird — Find a stand of Common Cattails in a marsh, a stormwater basin, or along a pond edge right now and you’re almost certain to find a male Red-winged Blackbird …

Red-winged Blackbird — …singing and displaying to defend a territory and attract a partner. Upon their arrival and selection of a mate, the brown-streaked females will weave well-hidden nests among the stems and leaves of these essential water-purifying wetland plants.

CategoriesCommon Cattail, Red-winged Blackbird

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Photo of the Day April 20, 2025
Coastal Waterfowl at the Capital City April 15, 2025
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THE ELEPHANT IN THE ROOM:

WARNING: BIG FOOTPRINT ALERT!

The lower Susquehanna valley's native wildlife and plant communities continue to be decimated by the expanding range of the planet's most invasive species: BIG FOOTPRINT (Homo sapiens macrovestigiorum). These are merciless, destructive beasts. KEEP YOUR DISTANCE!

Hierarchical Index

Animals (Animalia)
Astronomy
Bacteria
- Spirochaetes (Spirochaetota)
  - Spirochaetes (Spirochaetia)
    - Spirochetes (Spirochaetales)
      - Spirochetes (Borreliaceae)
        
        Borrelia burgdorferi
Birds on Radar
Climate
Early Naturalists
- Beck (Dr. Herbert H.)
- Linnaean Society of Lancaster City and County
Extinct Species
Fungus (Fungi)
- Sac Fungi (Ascomycota)
  - Class: Sordariomycetes
    - Order: Ophiostomatales
      - Pathogenic Tree Fungi (Ophiostomataceae)
        
        Ophiostoma himal-ulmi
        
        Ophiostoma novo-ulmi
        
        Ophiostoma ulmi
Geology
- Erosion
  - Floodplains
- Gettysburg Basin
  - Gettysburg Formation
    - Triassic redbeds
  - York Haven Diabase
    - Conewago Falls
      - Pothole Rocks
Habitats
Hawk Watches
Landmarks
Non-native/Introduced Species
- Invasive Species
Physiographic Provinces
Plants (Plantae)
- Conifers (Pinopsida)
  - Cypresses (Cupressales)
    - Cypresses (Cupressaceae)
  - Extant Conifers (Pinales)
    - Pines (Pinaceae)
- Flowering Plants (Angiosperms)
Pollution and Stream Impairment
Prions
- Prions in Humans
- Prions in Non-humans
Stream Rehabilitation
Tributaries
Uncategorized

Alphabetical Index

Why are those ducklings in the storm drain?…and so on.

Today, the fate of wildlife diversity, both locally and globally, is largely determined by the actions of sprawling masses of humans. If the conservation/preservation mindset of the public at large fails to broaden beyond lawn care, outdoor recreation, pet-keeping, and the hysteria of cute animal rescue, then at-risk species will have no real chance of long-term survival.

What does all that mean? It means you can stop feeding ducks now. It’s a good start.

Hand-fed waterfowl like these Mallards (polygamous form) quickly domesticate and lose their instinct to migrate. They soon become accustomed to human activity and begin wandering fearlessly into traffic where they are hazards not only to themselves, but to people too. Their incessant foraging within a small range pollutes water, degrades fisheries, and obliterates aquatic food chains, often extirpating entire populations of native plants and animals from local streams and wetlands. The irony of it all: duck feeding damages vital resting and breeding habitats needed by migrating waterfowl, the truly wild ducks and geese. So if you really love ducks, don't feed them. See how easy that is?

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