Birding/Common buzzard

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Question
Why do rooks crows seem to try to attack the buzzard i've seen this on numerous occasions

Answer
This is a common phenonmenon. The crows/rooks attack the hawk/buzzard to drive it out of the area since the buzzard may prey on the the crows. Although the buzzard can easily attack sitting or nesting crows, it is not as agile in the air as the crows are so the crows take advantage of this and drive the buzzard away when they see it. Roger Lederer at Ornithology.com

Birding

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Roger Lederer

Expertise

Any and all about WILD birds - the science of ornithology. Information about birdwatching, ecology, conservation, migration, behavior, banding, rehabilitation, feeding, songs, binoculars, identification, and careers in ornithology. No questions about pet or caged birds, please.

Experience

Have a PhD and over forty years as a professional ornithologist - research, teaching, author, speaker, webmaster of Ornithology.com . Have written thirty scientific papers, three bird field guides, a textbook in ecology and two recent books entitled "Amazing Birds" and "Birds of New England". Have traveled to over 90 countries watching birds.

Education/Credentials
PhD in Zoology/Ornithology; Emeritus Professor of Biological Sciences; former Dean of the College of Natural Sciences at California State University, Chico

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