Philadelphia Sees Largest Mass Collision Event in the City in 70 Years

Philadelphia Sees Largest Mass Bird Collision Event in the City in 70 Years

In a single day, more than 1,000 migrating birds collided with buildings within a small area in downtown Philadelphia, killing a particularly large number of Parula, Magnolia, Black-and-white, and Black-throated Blue Warblers, Common Yellowthroats, and Ovenbirds as well as smaller numbers of many other species. Birds collide with many types of buildings on a regular […]

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