Wagtails are common birds that can show fascinating but subtle species and subspecies differences. This article describes the identification of juveniles of 3 subspecies of Eastern Yellow Wagtails- tschutschensis, macronyx & taivana, in different plumages and morphs.
Image: Ayuwat Jearwattanakanok
https://ayuwat.blog/2021/09/30/juvenile-eastern-yellow-wagtails/
