The Eastern and Western Guides were carefully planned to avoid dividing states. The Rocky Mountains form a natural biological and climatic division of the continent, and basically any state or Province entirely east of the Rocky Mountains will be covered by the Eastern Guide, while states and provinces in, or west of, the Rockies will […]
What species are in the Eastern and Western bird guides? Read More »
The Sibley Guide to Birds Focus: bird identification Region covered: North America north of Mexico Species covered: 810 The Sibley Guide to Bird Life & Behavior Focus: understanding the behavior and ecology of birds Region covered: North America north of Mexico Species covered: over 800, information is summarized by bird family, with species mentioned as
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North Country Public Radio – October 10, 2003 David Sibley led a group of North Country birders along Clarkson University’s nature trails last fall. Martha Foley went along. The Diane Rehm Show – May 30, 2001 (scroll down) David Sibley: The Sibley Guide to Birds NPR Science Friday: December 22, 2000 Annual Audubon Christmas Bird