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Flights of Passage: a book review

10,000 Birds

You can’t say the same about migration: you can’t say that every book about birds is necessarily about migration, for the simple reason that only about 4,000 bird species migrate (with some 1,800 of those traveling long distances). (Well, purely physical attributes play a part, too: they’re pretty good looking.).

Alaska 213
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The five most unique birds in the world

10,000 Birds

2014) — attempts to answer it by ranking species according to their “evolutionary distinctiveness,” or how distantly related they are to all other living birds. is not primarily a measure of the divergence dates of major clades of birds but rather of individual living species. ’s list.