A raven is one of several larger-bodied members of the genus Corvus. These species don't form a single taxonomic group within the genus, but share similar characteristics and appearances that generally separate them from additional crows. The largest raven species are the common raven and the thick-billed raven.
The term "raven" originally referred to the common raven, the type species of the genus Corvus, which has a larger distribution than any additional species of Corvus, ranging over much of the Northern Hemisphere.
The modern English word raven has cognates in all additional Germanic languages, including Old Norse (and subsequently modern Icelandic) hrafn and Old High German (h)raban, all of which descend from Proto-Germanic *hrabanaz.
Obsolete collective nouns for a group of ravens (or at least the common raven) include "unkindness" and "conspiracy". In practice, most people use the more generic "flock".
- Corvus albicollis – white-necked raven
- Corvus corax – common raven
- Corvus coronoides – Australian raven
- Corvus crassirostris – thick-billed raven
- Corvus cryptoleucus – Chihuahuan raven
- Corvus mellori – little raven
- Corvus rhipidurus – fan-tailed raven
- Corvus ruficollis – brown-necked raven
- Corvus tasmanicus – forest raven
- †Corvus moriorum – Chatham raven
- †Corvus antipodum – New Zealand raven
- †Corvus corax varius morpha leucophaeus – pied raven