The Crossley ID Guide: Britain & Ireland — A Review of the Book
10,000 Birds
DECEMBER 3, 2013
Which, when you do the math, means that the guide covers all resident and migrant Breeders, birds that “Occur Year Round”, regular migrants, and then some. Abundance information–number of birds in the UK–is taken from the paper “ Population estimates of birds in Great Britain and the United Kingdom” by A.
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