Biogeography

Meet the newest species of bird in North America: A Gunnison Sage-Grouse specimen arrives in Chicago

The last new species of bird to be described in the United States--in fact the first since the 19th century--was Gunnison Sage-Grouse (Centrocercus minimus), described to science in 2000 on the basis of behavioral, vocal, and morphological (size and plumage) differences from its larger, more widespread cousin, the Greater Sage-Grouse (Centrocercus urophasianus).

A Cassin's Sparrow meets its end a long way from home

Every day during fall migration, the Chicago Bird Collision Monitors deliver to the Field Museum a bag of birds that died flying into windows in the loop as they tried to make their way south to their wintering grounds farther south. These salvaged birds provide a critical component of the museum's bird collection, specimens that can be used by researchers for generations to come to learn about many aspects of our area's birdlife.

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