Vocal and plumage variation in the Bewick’s wren is extensive ... buzzier. Songs of birds in the interior subspecies-group (ero­moph­ilus group) are simpler than those from the far West ...

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Migration: most birds in North America migratory. Major spring movement follows that of the winter wren; major fall movement precedes that of the Winter. Winter: generally as breeding, but with ...

Analysing 17 years of data about the movement of nearly 800 endangered purple-crowned fairy-wrens in north-west Western Australia, researchers have for the first time been able to identify exactly how ...