The Hawk Migration Association of North America has made available a silhouette guide to raptors in PDF form for free download and printing. You can also order laminated copies for 6 USD each.
Corey is a New Yorker who lived most of his life in upstate New York but has lived in Queens since 2008. He's only been birding since 2005 but has garnered a respectable life list by birding whenever he wasn't working as a union representative or spending time with his family. He lives in Forest Hills with Daisy and Desmond Shearwater. His bird photographs have appeared on the Today Show, in Birding, Living Bird Magazine, Bird Watcher's Digest, and many other fine publications. He is also the author of the American Birding Association Field Guide to the Birds of New York.
Thanks for the tip Corey! I will check it out! Swainson’s hawks are back in Sycamore Canyon and I accidently found a red-tail’s nest in a sagauro!