21 Jun '17, 12pm

Identifying bird dialects is a challenge, but if you're up for it, there's a way.

Identifying bird dialects is a challenge, but if you're up for it, there's a way.

These variations are less common among birds that migrate or travel over short distances because the song-learning pool is not so unique. For instance, when Black-capped Chickadees scope out different areas in search of food, they may swap notes with new acquaintances and mix and merge their songs. This results in a more uniform sound across the major Eastern population. But chickadees that live in isolation west of the Cascade Mountains in Oregon and Washington have developed their own dialects. “They have the most beautiful songs—a cascading series of whistles ,” Kroodsma says. “You cross the coastal range 30 miles away, and you’ll never find that song there.” Resident chickadees isolated on Martha’s Vineyard and Nantucket islands off the coast of Massachusetts have also developed their own dialects.

Full article: http://www.audubon.org/news/learn-your-local-birds-region...

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