Violetcup — Six of the Most Common Rat Species

Brown Rat — Rattus norvegicus

The classic “city rat.” Brown rats thrive around people because human environments reliably provide shelter, water, and food—especially in basements, sewers, warehouses, and alleyways.

Where it lives: now found worldwide.
Diet: omnivorous; opportunistic and highly adaptable.
Known for: intelligence, caution, and fast learning.

Brown rats are strong swimmers and excellent burrowers. In many places they outcompete other rats in ground-level habitats, which is one reason they’re so common in dense urban areas.

Black Rat — Rattus rattus

Sleeker and often more agile than the brown rat. Black rats are famous climbers and frequently prefer “up high” spaces: attics, rafters, trees, and dense vegetation.

Where it lives: many warm and temperate regions, especially ports and coastal cities.
Diet: seeds, fruit, insects, and scraps.
Known for: climbing ability and living above ground.

Where both species exist, black rats often shift to upper levels while brown rats dominate lower, ground-level areas. This “vertical split” helps both survive in the same neighborhoods.

Polynesian Rat — Rattus exulans

A smaller rat that spread widely across Pacific islands alongside human voyagers. On islands, it can quickly occupy niches as a generalist feeder.

Where it lives: Oceania and many Pacific islands.
Diet: seeds, fruit, invertebrates, and food leftovers.
Known for: efficient island colonization.

Island ecosystems can be especially sensitive to introduced predators and omnivores. That’s why conservation programs sometimes focus on preventing rats from reaching isolated habitats.

Himalayan Rat — Rattus nitidus

A rat associated with upland and forested regions of South and Southeast Asia. It may appear near farms and settlements, but it’s often tied to more natural cover than purely urban rats.

Where it lives: Himalayan regions and nearby areas of South/Southeast Asia.
Diet: plant material, seeds, insects; sometimes grain.
Known for: tolerance of cooler, higher-altitude environments.

For a gallery, this species looks great with “wild” backdrops—leaf litter, rocks, forest edges—so it visually contrasts with the city-adapted species.

Ricefield Rat — Rattus argentiventer

Strongly associated with rice agriculture in Southeast Asia. Ricefields can provide everything a rat needs: food, water, and hiding places—especially when crops are near harvest.

Where it lives: Southeast Asia, mainly agricultural landscapes.
Diet: rice and grains, seeds, shoots; occasionally insects.
Known for: seasonal population spikes around harvest time.

In farming regions, rodent management often focuses on habitat timing: the same fields can be low-risk early in the season but become highly attractive when grain ripens.

Greater Bandicoot Rat — Bandicota indica

Not a Rattus species, but commonly called a “rat” in English. It’s often larger-bodied and strongly ground-oriented, known for digging substantial burrows.

Where it lives: South and Southeast Asia.
Diet: omnivorous; roots, grains, and food waste.
Known for: powerful digging and deep burrow systems.

Bandicoot rats can be surprisingly robust. Their burrows may have multiple entrances and chambers, which makes them harder to deter in some rural and peri-urban settings.