noun
cattle egret
A species of heron often seen near livestock; scientific name Bubulcus ibis.
田んぼでアマサギが牛のそばに立っていた。
A cattle egret was standing near a cow in the rice field.
The name likely combines あま (sweet, or possibly a variant of あめ 'rain') with さぎ (heron), but the exact derivation is uncertain.