Appendix "Birds Cupid" allows you to learn more about our winged neighbors - birds of the Russian part of the Amur ecoregion, living on the territory of Trans-Baikal to the south of Primorye. It is intended for ornithologists experts PA employees and environmental organizations, and the general public. The app not only tells about the birds by way of illustration, text, infographics, video, audio and photos, but also allows users to read and post news, mark on the map bird watching location and view marks of others.