The Grey Crow, also known as the Bare-faced Crow, sports a predominantly black plumage with a noticeable light grey patch at its neck and underside. It also has a bare, pinkish face and blue eyes. It measures 16-18 inches in length, similar to a medium-sized raptor. 

Primarily found in New Guinea and some nearby islands, this crow species thrives in many habitats, from coastal areas to mountain forests. Their diet is varied: fruits, seeds, and small animals.

The Carrion Crow stands around 19-20 inches tall, boasting an all-black appearance that extends to their strong, stout bill and legs. Their glossy plumage exhibits hints of green and purple sheen. 

You'd commonly find Carrion Crows stretching from Scandinavia to Spain across Western Europe. They adapt to numerous environments, from forests and fields to town centers.

As a predatory bird, their diet mainly comprises carrion, although they also eat insects, worms, fruits, and seeds. They also steal eggs and catch from other birds.

Fish Crows sport an all-black body, much like its relatives. It typically measures 14 to 16 inches in length. This species' distinguishing feature is its short, nasal, muffled call, different from the typical caw of other species.

These types of crows live mainly in the coastal regions and inland waters in the United States. Its diet includes fish and other seafood, hence the name, along with seeds, insects, and occasional food scraps.

The Pied Crow, standing at roughly 20 inches tall, is a native to sub-Saharan Africa. It boasts a primarily jet-black, white chest and belly area. Its habitat spans grasslands, semi-deserts, and human-inhabited areas.

This omnivorous bird has a diverse diet comprising small mammals, insects, fruits, as well as waste from human settlements.

The Cape Crow, also known as the Black Crow, showcases a glossy black body spanning up to 20 inches.  It has proportionally longer body parts and slimmer bills than other crows. 

Endemic to the more arid regions of eastern and southern Africa, the Cape Crow's diet mainly consists of grains, seeds, and invertebrates.

The Jamaican Crow, or the Jabbering Crow, stands out with its 15-inch size and dull black feathers. Particularly distinctive is its vocal range, with unique calls like garbled jabbering.

Thriving in Jamaica's lush forests and mountainous regions, this type of crow feeds on fruits, small reptiles, and the catch or eggs from other birds.

The House Crow stands out with its grey neck and belly, contrasting its otherwise black feathers. With a size of around 16 inches, this crow species is on the smaller side. While primarily recognized in India, it has adapted to diverse regions, including Africa, Europe, and other parts of Asia.

A true omnivore, the House Crow consumes a range of diets from plant-based materials to various types of meat, often scavenging around human population centers.

The New Caledonian Crow is mid-sized, boasting up to 16 inches long. It has iridescent black plumage and beaks with lower mandibles slightly curved upward. 

This type of crow takes residence in the primary forests of New Caledonia, a group of islands in the South Pacific.

Named for their home, the Bougainville Crow inhabits the rainforests of Bougainville Island in Papua New Guinea. This moderate-sized crow comes in around 16 inches long. They don a uniform black plumage with blue gloss at the head and a purple sheen at the upperparts. Their large beaks are strongly arched downwards.

The Cuban Crow is one of the Caribbean crows alongside the White-necked Crow (Corvus leucognaphalus) and Palm Crow (Corvus palmarum). They reach sizes of up to 17 inches long. Their plumage displays a glossy, deep black hue and long, gently curved beaks.

Native to Cuba and the Isla de la Juventud, these crows inhabit both forests and agricultural lands. As omnivores, they consume a vast diet ranging from seeds and fruits to tiny insects.