Heretic II is a fantasy action-adventure game developed by Raven Software and published by Activision in 1998 continuing the story of Corvus, the main character from its predecessor, Heretic.

* Corvus ( boarding device ), a boarding device used by ancient Roman warships

* Gibson Corvus, a guitar series produced by Gibson in the ' 80s

* SS Corvus, a Norwegian steamship sunk by German U-boats in February 1945

The battle is a success for the Romans, who, it is said, are led by Marcus Valerius Corvus.

In the United States similar systems were manufactured by Corvus and Alpha Microsystems.

Instead the sources focuses on a mutiny by part of the soldiery, which was suppressed by the sympathetic common sense of the distinguished dictator Marcus Valerius Corvus, who was said to have vanquished a Gallic champion in single combat in his youth.

* P. p. docilis, described by Johann Friedrich Gmelin as Corvus docilis in 1774, breeds from Greece to Afghanistan.

The Alpine Chough was first described as Corvus graculus by Linnaeus in the Systema Naturae in 1766.

The Carrion Crow was one of the many species originally described by Linnaeus in his 18th century work Systema Naturae and it still bears its original name of Corvus corone.

It has the typical white iris of the other Australasian Corvus species but can be distinguished from most ( except the Little Crow ) by the base of the head and neck feathers being snow white ( revealed when blown by a strong wind ).

The genus Coloeus, from the Ancient Greek κολοιός ( koloios ) for jackdaw, was created by Peter Pallas in 1766, though most subsequent works have retained the two jackdaw species in Corvus.

The House Crow ( Corvus splendens ), also known as the Colombo Crow is a common bird of the Crow family that is of Asian origin but now found in many parts of the world, where they arrived assisted by shipping.

It is suspected that paramyxoviruses, such as PMV 1 that causes of Newcastle disease may be spread by Corvus splendens.

The Alpine Chough was described as Corvus graculus by Linnaeus in the 1766 edition of the Systema Naturae.

Although Corvus is the crow genus to which the choughs ' closest relatives belong, they were considered sufficiently distinctive to be moved to the new genus, Pyrrhocorax, by English ornithologist Marmaduke Tunstall in his 1771 Ornithologia Britannica, The genus name is derived from Ancient Greek πύρρος ( purrhos ), " flame-coloured ", and κόραξ ( korax ), " raven ".

These birds have black plumage similar to that of many Corvus crows, but they are readily distinguished from members of that genus by their brightly coloured bills and legs.

The alternative common name Waldrapp is German for forest crow, the equivalent of the Latin Corvo sylvatico of Gesner, adapted as Corvus sylvaticus by Linnaeus.

This appointment was brought about by the revolt of the Marsi at Arretium and Carseoli, and Corvus was able not only to defeat them in battle, but to take the fortified towns of Milionia, Plestina and Fresilia.

While Corvus was in Rome taking the auspices, his Magister equitum ( probably Marcus Aemilius Paullus ) was ambushed by the enemy, and forced to retreat to his camp, in the process of which Paullus lost a portion of his army.

To later Roman writers, he was a memorable example of the favours bestowed by Fortuna, and Augustus erected a statue of Corvus in the Forum of Augustus, alongside the statues of other Roman heroes.

* Corvus brachyrhynchos brachyrhynchos – Eastern Crow: northeastern United States, eastern Canada and surroundings.

* Corvus brachyrhynchos paulus – Southern Crow: southern United States.

The Fish Crow ( Corvus ossifragus ) is a species of crow that is associated with wetland habitats in the eastern and southeastern United States.

The Sinaloan Crow ( Corvus sinaloae ) appears to be genetically extremely close to this bird and can be considered the western form of it though the voice is quite different, indeed a third species, the Fish Crow ( Corvus ossifragus ) of the southeastern United States appears to be very closely related to them also and the three may be considered a superspecies.

* 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

The Little Crow ( Corvus bennetti ) is an Australian species of crow, very similar to the Torresian Crow in having white bases to the neck and head feathers ( shown when ruffled in strong wind ) but slightly smaller ( 42 – 48 cm in length ) and with a proportionately smaller bill.

* Corvus brachyrhynchos hesperis – Western Crow: Western North America except arctic north, Pacific Northwest and extreme south.

* Corvus brachyrhynchos pascuus – Florida Crow: Florida.

* Parr, C. ( 2005 ): Animal Diversity Web – Corvus brachyrhynchos.

* Star Tales – Corvus and Crater

The White-necked Raven ( Corvus albicollis ) is somewhat smaller ( 50 – 54 cm in length ) than the Common Raven or indeed its nearest relative, the Thick-billed Raven C. crassirostris.

It is very similar to the more western forms of the widespread American Crow ( Corvus brachyrhynchos ), but it averages slightly smaller ( 33 – 41 cm in length ) with proportionately smaller feet and a slightly more slender bill.

Visually, it is nearly identical to and the same length ( 34 – 38 cm ) as the Tamaulipas Crow ( Corvus imparatus ).

The Cape Crow or Black Crow ( Corvus capensis ) is slightly larger ( 48 – 50 cm in length ) than the Carrion Crow and is completely black with a slight gloss of purple in the feathers.

The Brown-necked Raven ( Corvus ruficollis ) is a larger bird ( 52 – 56 cm in length ) than the Carrion Crow though not as large as the Common Raven.

Marcus Valerius Corvus ( c. 370 BC – c. 270 BC ) was an important military commander and politician from the early to middle period of the Roman Republic.