noun
night crow; crow at night
Refers to a crow active or heard at night. Often carries a poetic or slightly eerie nuance, appearing in literature and traditional contexts.
夜烏の鳴き声が闇に響いた。
The cry of a night crow echoed in the darkness.
夜烏が月明かりの下を飛んでいった。
A night crow flew under the moonlight.
烏 is the general word for 'crow' or 'raven', while 夜烏 specifically refers to a crow at night, often with a literary or atmospheric connotation.
Compound of 夜 (yo, 'night') and 烏 (karasu, 'crow'). The reading よがらす is a straightforward combination of the two elements.