House crow: where and when to see them

The house crow is a slender, adaptable crow native to South Asia and established in several places through human-assisted dispersal. In the Maldives it is associated with inhabited islands and human food resources rather than pristine wilderness. A grey neck and breast contrast with its black head, wings and tail. Its intelligence and close relationship with settlements help it exploit changing environments, while introduced populations can create problems for native wildlife.

Size

40-43 cm long

Weight

250-350 g

Lifespan

Not reliably established

Status

Least Concern

House crows forage socially, monitor one another's discoveries and readily investigate predictable food sources. They gather at communal roosts and communicate with a variety of harsh calls. Pairs build stick nests in trees or suitable structures, and adults may defend nearby young. Their boldness around people reflects learning and opportunity rather than domestication, and feeding can encourage persistent approaches or concentrate birds where conflicts are more likely. House crows are highly intelligent and adaptable, capable of complex problem-solving to access food or avoid perceived threats. Their social learning enables rapid exploitation of new food sources and adaptation to human environments, which contributes to their success as an invasive species.

• Ship-assisted transport has helped it establish far beyond South Asia.
• Communal roosts can contain many birds from surrounding feeding areas.
• Its grey collar contrasts with the glossy black face and crown.
• It can learn recurring human routines associated with food.

Resident populations can be observed throughout the year where established. Morning and late afternoon often provide active foraging and movements toward roosts. The Maldives' drier months improve walking conditions, but they are not a demonstrated island-wide breeding season for this species. While breeding activity can occur throughout the year in tropical climates, peak nesting periods might be influenced by local food availability. Their year-round presence means that any visit to inhabited Maldivian islands is likely to offer opportunities for observation.

Typical habitat includes towns, ports, markets, gardens and other settled coastal areas with trees or structures for nesting and roosting. In the Maldives, availability of food waste strongly influences use of inhabited islands. Remote natural islands should not be assumed to support them. Originally from South Asia, the house crow has become an invasive species in many parts of the world, including some Indian Ocean islands. Its presence in the Maldives is a result of human introduction, likely via cargo ships or dhows from the subcontinent.

An opportunistic omnivore, the house crow eats insects, small vertebrates, eggs, fruit, grain, carrion and discarded food. It may raid nests or steal food from other birds. Secure waste management reduces artificial feeding opportunities and can help limit impacts on native species. In areas with abundant human food waste, house crows can become highly dependent on these resources, leading to population increases. Their varied diet allows them to adapt to diverse urban and semi-urban environments where human activity provides consistent food sources.

Common name

House crow

Scientific name

Corvus splendens

Animal group

Birds

Size

40-43 cm long

Weight

250-350 g

Lifespan

Not reliably established

Status

Least Concern

Identification

The contrasting grey neck and breast, slim bill and relatively slender build distinguish it from larger, more uniformly black crows. The glossy black head, wings, and tail sharply contrast with the duller grey nape, neck, and underparts. Its relatively small size and high-pitched 'kaaw-kaaw' call are also key distinguishing features from larger corvid species.