鸝

Glyph origin
Attested somewhat late, earliest in "Rhapsody on Gaotang [Shrine]", attributed to & included in :

Etymology
glosses 鸝 as meaning " yellowish black"; and also proposes that the black-naped orioles are named after "their yellow and sallow black colorings"; Li Shan  apparently relates the birds' color 鸝／鹂 to the horses' coat-color  by treating each graph as the other's variant.