紫背苇鳽

zǐ bèi wěi yán

(bird species of China) von Schrenck's bittern (Ixobrychus eurhythmus)

紫

zǐ

purple

背

bèi

the back of a body or object

苇

wěi

reed

鳽

yán

(used in naming bitterns and several other species of heron)