Gender of Red-Tailed Hawks Revealed by Size & Weight

[Donna]

http://www.livescience.com/14660-understanding-red-tailed-hawk-migration-bts.html

As any resident of upstate New York will tell you, the red-tailed hawk is the most common hawk in North America. Often seen perched on utility poles along major highways, this majestic animal is one of the most widely recognized raptor species.
In 2003, scientists at Finger Lakes Community College and Braddock Bay Raptor Research (BBRR) began asking questions about the migration patterns that they were observing during BBRR's annual hawk watch and banding program.