BirdsEye Galápagos
Birds in the Hand, LLC
Birdeye
BirdEye
Picture Bird - 拍照識鳥
Next Vision Limited
eBird by Cornell Lab
Cornell Lab of Ornithology
Collins Bird Guide
NatureGuides Ltd
iNaturalist (愛自然)
iNaturalist
Merlin 鳥種識別 by Cornell Lab
Birds of Russia Field Guide
Ecosystema
Picture Insect: Bug Identifier