The head shape of Herring Gulls seems to change seasonally

sketch of gull head shapes

I always enjoy studying Herring Gulls, just looking at variation and trying to categorize the birds into age, sex, and regional groups. Last winter I was watching the gull flock at Turners Falls, MA, paying special attention to when the adults molted into breeding plumage. My thought was that the early-molting birds would be from …

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12 days until “What it’s like to be a Bird” goes on sale, with a starred review!

My newest book becomes available April 14th, in bookstores everywhere. You can read a little more about it at these links: here in my web store An excerpt is available at my publisher’s website and a starred review has been published in Library Journal I’ll be posting more in the coming days, stay tuned, and …

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Interviews

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 …

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Which bird book should I buy?

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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