House crow

The house crow, known scientifically as *Corvus splendens*, is a highly adaptable member of the crow family.

This bird is recognized for its ability to thrive in environments shaped by human activity. It is often referred to by several names, including the Indian, greynecked, Ceylon, or Colombo crow. While it originated in Asia, it has become a widespread species found on many different continents. This global presence is largely due to its ability to travel via shipping. Because it lives so close to people, understanding its behavior and movement is very important for scientists.

Physically, the house crow is a distinct bird with specific coloring patterns. Its length is intermediate, falling between the size of a jackdaw and a carrion crow. However, it possesses a slimmer body than either of those species. The bird features a richly glossed black forehead, crown, throat, and upper breast. In contrast, the neck and breast area are a lighter grey-brown color. The wings, tail, and legs remain solid black. There are also regional variations in the depth of plumage color and the thickness of the bill.

Taxonomists categorize several subspecies based on their specific locations and appearances. The nominate race, *C. s. splendens*, lives in Pakistan, India, Nepal, and Bangladesh, and it features a grey neck collar. In the dry regions of Iran and South Asia, the subspecies *C. s. zugmayeri* is found with a very pale neck collar. The *C. s. protegatus* subspecies lives in Sri Lanka, the Maldives, and southern India, and it appears darker grey. Finally, the *C. s. insolens* subspecies found in Myanmar is the darkest form and lacks a grey collar entirely.

The history of the house crow's scientific naming began in 1817. A French ornithologist named Louis Vieillot formally described the species as *Corvus splendens*. He based his description on a specimen that had been collected in Bengal. The specific epithet, *splendens*, is derived from the Latin word meaning "brilliant" or "glittering."

Since that initial description, the bird's range has expanded significantly due to human movement and trade.

House crows are highly successful because they are omnivorous scavengers. This means they can eat a wide variety of foods to survive. Their diet includes grain, fruit, insects, and other small invertebrates. They also hunt small mammals and reptiles, and they have even been seen snatching baby squirrels from the air.

Much of their food is found on the ground near human settlements, such as marketplaces or garbage dumps. They are so flexible that they can survive on nearly anything that is edible. This ability has allowed their populations to multiply alongside the explosion of human populations.

The distribution of the house crow shows how it moves across the globe. It is native to southern Asia, including countries like Nepal, India, and Thailand. Around 1897, it was introduced to East Africa near Zanzibar and Port Sudan. While they arrived in Australia via ships, those populations were eventually exterminated. In Europe, they have been breeding in the Dutch harbor town of Hook of Holland since 1998. A small population is also established near St. Petersburg, Florida, in the New World.

In Singapore, researchers recorded a high density of 190 birds per square kilometer in 2001.

Beyond their diet, house crows demonstrate remarkable intelligence and social behaviors. They are one of the very few species in the corvid family with documented tool usage. They are also the only known corvid capable of passing the mirror-mark test. This test identifies self-recognition, which is the ability of an animal to recognize itself in a mirror.

For nesting, they typically build stick nests in large trees with big crowns, though they sometimes use telephone towers. They often roost in large communal groups in well-lit, busy areas near human activity. Their presence can also have biological impacts, as they may carry diseases like Newcastle disease or the fungus *Cryptococcus neoformans*.