Rare poetic name for the lesser cuckoo (Cuculus poliocephalus), literally 'twilight bird', evoking its call at dusk. The common name is 時鳥 (ほととぎす).
See also: ホトトギス
'Tasogaredori' is sometimes used as an elegant name for the lesser cuckoo in waka poetry and similar contexts.
Compound of 黄昏 (tasogare, 'twilight') and 鳥 (tori, 'bird'), referring to the lesser cuckoo's characteristic call at dusk. The exact historical origin of this poetic name is uncertain.