Birds of Europe Field Guide
Ecosystema
Birds of Russia Field Guide
European Birds Songs & Calls
ЭкоГид: Птицы средней полосы
Birds of North America: Decoys
Birds Encyclopedia Offline App
Edutainment Ventures- Making Games People Play
Bird Decoys: Songs and Calls
NABU Vogelwelt Vögel Bestimmen
Sunbird Images OHG
Collins Bird Guide
NatureGuides Ltd
Birds of Russia Songs & Calls