dark-activity

uncountable

(ornithology) Avian behaviour that occurs at night or in the twilight.

Japanese Meaning

（鳥類学）夜間または夕暮れ時に見られる鳥の行動

Researchers observed a surprising amount of dark-activity among the coastal shorebirds during the summer months.

研究者たちは夏の間、沿岸の海鳥の間で予想外に多くの夜間の活動を観察した。

Sense（1）

(ornithology) Avian behaviour that occurs at night or in the twilight.