Granted I am biased but... This is a great app!
This release adds run-time permission support and the ability to choose between Wikipedia and Audubon sources on the Birds tab. Other small fixes have been included.
eBird Mobile lets you record the birds you see, adding them to eBird with ease
Birds Guide app for Vietnam, Laos, Cambodia, Thailand & Southeast Asia
HKcBirds: Common Birds of Hong Kong — Birds of Hong Kong in your hands!