The iTunes App Store offers Audubon Field Guide to North American Reptiles and Amphibians for Apple iPhone, iPod touch, and iPad for 99 cents. That's a $4 drop and the lowest price we could find for this lizard identification app. It'll allow you to answer the question "I wonder what kind of of lizard that is?" (even though you should be asking, "Why are there so many of them in my laundry bag?!") Deal ends October 24.