Merlin Bird ID
Identify the birds you see or hear with Merlin Bird ID.
Free global bird guide with photos, sounds, maps, and more.
Download: Merlin Bird ID for iOS and Android
Demo: Merlin Bird ID Demo from the Cornell Lab of Ornithology

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                                                  eBird
Keep track of your birding activity, while making your data openly available for scientific research, education, and conservation with eBird.
Download: eBird Mobile 
Start by taking the FREE eBird Essentials course. This 100% free, online course answers most new user questions and helps you start eBirding faster!