Hey, Will I can't believe that with this many answers to your original post, there doesn't seem to be a birder in the bunch. And I'll bet I'm very likely the only one who ever taught Ornithology at the university level! My choice of the identity of the big raptor is a mature golden eagle. Right eye color, shoulder and neck color, two-toned beak (but not yellow). The beak color and eye color say it's not a bald eagle. Harris's hawk and Swainson's hawk have white on their neck. So a golden is all that's left (and Harris's is basically very southern TX, NM, and AZ). That is a spectacular photo!! The three best reference books for novices (or pros) are the Peterson Field Guide to Western Birds or Eastern Birds or Birds of Texas (depending on where you are). The Sibley Guide to Birds and the National Geographic Society Field Guide to the Birds are also excellent (better for Bird Carvers and paper model designers than Peterson) Most good book stores have them, as to most libraries (never needed a Field Guide in a Library:roll. While you're in the book store, buy a copy of the new edition of Montgomery and Foster's Field Guide to the Airplanes. It is delightful:-D !! And check out the other airplane books while you're at it!