American robin
Refers specifically to the American robin (Turdus migratorius), not the European or Japanese robin.
An American robin came to the garden.
Usually written in katakana; the kanji form 駒鶇 is rare.
Kanji form; rarely used.
The name likely derives from 駒 (こま, 'horse') + 鶇 (つぐみ, 'thrush'), but the exact origin is uncertain.