bird watching

This weekend I've been identifying birds in my area - now that I'm paying attention I see cool birds everywhere!  I've found three (beautiful!) Red-Headed Woodpeckers, a flock of Chimney Swifts, Wood Thrushes, Cardinals, and Finches.  I think there are quite a few Mockingbirds in my neighborhood, but I still need to compare them more closely to my guidebook photos : )

Are any of you into birds?  What bird guides would you recommend for beginners?