中大鳥 Birds of CUHK app for iPhone and iPad

CU Birds is a joint production of Grateful Green Group and IdeasLab.
There are games of identifying birds by their calls and songs, covering 50 species of birds found on The Chinese University campus and other parts of Hong Kong. The app features about 200 high-resolution photos taken by seasoned wildlife photographers. With English and Chinese descriptions, it is good for both beginning bird watchers and bird researchers. Free of charge and without commercials, once downloaded, CU Trees can be used offline.