Audubon Birds: A Field Guide to North American Birds – Amazon Appstore for Android – Free app of the day

Identify North American birds with quality photos, bird songs, range maps, and descriptions. Browse, search, and customize; over 770 species detailed! The essential guide to identifying common and rare species of birds. Internet connection required for additional content (529 MB bulk download available).

Get it here
http://www.amazon.com/mobile-apps/b/ref=topnav_storetab_mas?ie=UTF8&node=2350149011
http://www.amazon.com/gp/product/B004R49A4W?ie=UTF8&ref=mas_faad