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Birds Of The World An Online Bird Book
This website is designed to serve as an online bird book. For ease of comparison, there are many species of birds on a web page. There are also links to similar birds that further help to compare species.
Author(s): carolinabirds.org
NA Pages
Argentine Ornithology, Volume I
This book contains an account of the Passeres of the Argentine Republic, which, as at present known, number some 229 species.
Author(s): P. L. Sclater and W. H. Hudson
NA Pages
