40 Gartenvögel & ihre Stimmen
NABU-Zentrum Rheinauen
NABU Vogelwelt Vögel Bestimmen
Sunbird Images OHG
Bird Kind
Runaway Play
Flora Incognita
Technische Universität Ilmenau
Merlin Bird ID by Cornell Lab
Cornell Lab of Ornithology
Seek by iNaturalist
iNaturalist
Audubon Bird Guide
National Audubon Society
Picture Bird - Bird Identifier
Next Vision Limited
Bird Buddy: Tap into nature
Bird Buddy
BirdNET
Stefan Kahl