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karner blue butterfly, endangered butterfly

National Endangered Species Day: Lest We Forget

5/17/2011 // By Roger Di Silvestro

Probably the most astonishing wildlife spectacle that ever occurred in American history was the migration of the passenger pigeon, a bird that resembled a larger, more colorful mourning dove, with a bluish back and a rosy breast. Now largely forgotten, […] Read more >

Bison bulls establish a hierarchy in Yellowstone National Park in a photo by J.L. Wooden

Passenger Pigeons, Bison and Global Warming

11/15/2010 // By Roger Di Silvestro

It was probably the most astonishing wildlife spectacle in all of American history—the migration of the passenger pigeon, a bird larger than the mourning dove, with a bluish back and a rosy breast—the most common bird on the continent in […] Read more >