Credits
Bird photographs licensed via Adobe Stock (standard license), background removed with the Adobe Photoshop API.
Song recordings, xeno-canto.org
Eurasian Wren Troglodytes troglodytes
Sunny Tseng, XC1152294 (CC BY-NC-SA 4.0)
European Robin Erithacus rubecula
steve, XC1142125 (CC BY-SA 4.0)
Common Blackbird Turdus merula
Clement Bruneau, XC1150997 (CC BY-NC-SA 4.0)
Great Tit Parus major
Sunny Tseng, XC1152300 (CC BY-NC-SA 4.0)
European Goldfinch Carduelis carduelis
Pascal Christe, XC1152232 (CC BY-SA 4.0)
Full details: CREDITS.md in this repo.