A bird active at night, sometimes identified with a specific species such as a night owl or nightjar, and sometimes seen as a separate animal in its own right.

A common raven, Corvus corax.

A large all-black passerine bird in the crow family, Corvus corax. / A dark-colored South Asian swallowtail butterfly, Papilio castor

Hempel's paradox

A kind of high-quality sailcloth.

An American cottoid fish, Hemitripterus americanus, allied to the sculpins. / Any fish in the family Hemitripteridae. / The cormorant.

plural of sea raven

plural of night-raven

plural of northern raven

plural of common raven