Ravens in Winter
Why should ravens--which are usually solitary birds--share valuable food in the dead of winter? How clever are these birds? Do they have a language? These are some of the riddles that noted sociobiologist Bernd Heinrich, author of Bumblebee Economics and winner of the John Burroughs Medal,...
show more
Why should ravens--which are usually solitary birds--share valuable food in the dead of winter? How clever are these birds? Do they have a language? These are some of the riddles that noted sociobiologist Bernd Heinrich, author of Bumblebee Economics and winner of the John Burroughs Medal, explores in this intriguing book. 16 pages of drawings.
show less
Format: paperback
ISBN:
9780679732365 (0679732365)
ASIN: 679732365
Publish date: October 1st 1991
Publisher: Vintage
Pages no: 400
Edition language: English
Log in with Facebook 
