May's book giveaway is Kenn Kaufman's new Field Guide to Advanced Birding! I have yet to see this wonderful book, but I have the older edition and it is great.
So you wanna win this book? Leave a comment here on my blog in answer to this question:
What was your most difficult field ID challenge?
Comments MUST be posted here on this blog, by Wednesday, May 11, at 6:00 PM Mountain time. If you must sign in as anonymous - I MUST have your name or a way to contact you.
Winner will be randomly chosen.. the numbers in the hat thing, OK?