These Crows Evolved Into a New Species, Boned the Old Species Too Much, Now Back Where They Started

Photo of These Crows Evolved Into a New Species, Boned the Old Species Too Much, Now Back Where They Started
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Hundreds of thousands of years ago, a glacier advanced upon the Pacific Northwest, its ice forming a natural barrier that fractured crows into two populations. These populations began to diverge into two separate species, which ornithologists decided were distinguishable by small differences in body measurements and…

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#ecology
#evolution
#biology
#birds
#ice age
#crows
#science
#birdmodo