This app won the 2011 Best App Ever award for Best Outdoors App this past year. It’s now on sale for $14 less than usual. The sale will run through Monday, 9/17/2012, so grab it now.

Peterson Birds gives you illustrations, birds songs, range maps, and nest photos for over 800 species of North American birds on your on your iPhone, iPod touch, and iPad.

More detail than any other mobile bird guide, with information from 8 Peterson Field Guide books, including the best-selling guide to birds in print, Peterson Field Guide to Birds of North America.

source: Best App Ever 2011