The Torresian Crow, a native of Australia and Papua New Guinea, stands out due to its size. Typically measuring 19-21 inches, it is notably one of the largest species within the crow family. It boasts the standard black plumage and eyes with a white iris and blue ring.

Moreover, this bird thrives across various habitats near bodies of water, from swamps to eucalyptus woodland. They are also common in farmlands and urban landscapes.

The Tamaulipas Crow, distinctively smaller than the average crow, measures around 15 inches long. Exhibiting a glossy black body and slender bill, these crows stand out for their unique charcoal-grey eyes, deviating from the usual dark eyes of standard crows.

This type of crow inhabits the Northeastern plains of Mexico and southernmost Texas. Unlike other bird relatives, they have a low, croaking call, unlike the harsh caw that most crows are known for.

The Sinaloa crow (Corvus sinaloae) is a crow native to western Mexico.

The Sinaloa Crow, a species exclusive to Mexico's Pacific coast, is a relatively small crow, standing at a modest 14-15 inches. It's similar to the previous type of crow, but Sinaloa Crows have high-pitched calls.

The long-billed crow (Corvus validus) is a crow that is endemic to the Northern Maluku Islands. This crow is large with glossy plumage, a large bill and white irises. It is classified by the International Union for Conservation of Nature as a "near-threatened species".

The Long-billed Crow, endemic to the Maluku Islands in Indonesia, is a distinctive crow with a long beak, relatively short tail, and white iris. Akin to other crows, its plumage is black but measures up to 21 inches larger. 

In 2016, IUCN reassessed these forest-dwelling birds and changed their status from "least concern" to "near threatened." The declining population results from habitat loss due to commercial logging and agricultural conversion4.

The Large-billed Crow, formerly called the Jungle Crow, is characterized chiefly by its substantial bill, with the upper part thick and arched. It showcases dark gray and glossy black plumage with a robust body measuring up to 23 inches long. 

Geographically, this species is widely distributed across Asia and adaptable to forests and human-dominated landscapes.

The Slender-billed Crow, native to Indonesia and Papua New Guinea, is identifiable by its long, thin beak and jet-black plumage. Measuring about 16 inches from beak to tail, they are pretty similar in size to other common crows. You’d find them in the subtropical and tropical forests in Southeast Asia.

The Banggai Crow, unique to Indonesia, sports a length of around 15 inches, a mid-size in the crow world. Its glossy plumage is predominantly black, while its dark eyes have pale irises. This species is adapted to dense forest habitats in the Banggai Islands. 

Previously thought to be extinct, searches in the early 2000s rediscovered them. Since then, local communities and governments have taken measures like awareness campaigns and promotion of forest protection. Today, they are critically endangered, with less than 250 mature Banggai Crows in the wild3.

The Mariana crow (Corvus kubaryi) (Chamorro name: åga) is a species of the crow family from the tropical Western Pacific. It is a glossy black bird about 15 inches (38 cm) long and known only from the islands of Guam and Rota.

It is a rare bird which has steadily declined in numbers since the 1960s.[2] On Guam there are no remaining native Mariana Crows, the population having been decimated by the introduction of the brown tree snake.[3] On Rota the population has declined to fewer than 200 individuals,[4] the main threats here being the reduction of suitable habitat because of development and predation. Despite translocations from Rota to the Guam National Wildlife Refuge in the late 1990s and early 2000s, by 2011 the Mariana Crow was extirpated from Guam.[5] Current conservation efforts on Rota include habitat protection,[6] and a captive rear-and-release program.[7] The International Union for Conservation of Nature  has rated the bird as being "critically endangered".

The Hawaiian Crow, or Alala, is a medium-sized bird at 19–20 inches long. Notably, it flaunts stark black feathers with brown-tinged wings and tail and a thick, strong beak.

Our last type of crow is the rarest of all corvids and became extinct in the wild in 2002, mainly due to habitat destruction and diseases. However, through conservation efforts, captive birds rose from 20 in the 90s to 115 individuals in 2014. They have been reintroduced into native Hawaiian forests since 2016.

The Rock Dove, also known as the Rock Pigeon, is a versatile bird native to Europe, North Africa, and Western Asia. They have a colorful appearance with distinct black bars on their wing coverts. 

Their homing instinct is their most remarkable feature, allowing them to navigate back home from hundreds of miles away at 50 miles per hour. 

Rock pigeons can also travel up to 700 miles daily and have a storied history as long-distance messengers, aerial acrobats, and survivors.