The Pocket Environmentalist

17 smartphone apps that help save the planet

8. iBird Yard+ Guide to Birds

Calling all bird lovers! The iBird Yard+ Guide to Birds is a must-have for those wanting to get started in birding. This comprehensive field guide app helps you identify and learn more about 231 North American bird species, including the ones in your backyard. Bonus: the app even includes playable bird calls.
($4.99, Apple; $9.99, Android)