BirdNET
Stefan Kahl
Merlin Bird ID by Cornell Lab
Cornell Lab of Ornithology
iNaturalist
NABU Vogelwelt Vögel Bestimmen
Sunbird Images OHG
Picture Bird - 撮ったら、判る-1秒鳥図鑑
Next Vision Limited
Collins Bird Guide
NatureGuides Ltd
European Birds Songs & Calls
Ecosystema
ObsIdentify
Observation International
Birds of Europe Field Guide
Birdie Memory
Merle Blanc