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Asian House Rat

Rats, Mice & Porcupines

Rattus tanezumi

Basic stats

Diet

Grain, seeds, food waste, invertebrates

Habitat

Villages, plantations, forest edge

Range

Widespread across Asia, including Borneo

Litter size

4–8 young (typical for Rattus)

Gestation period

About 21–23 days (typical for Rattus)

Size

Medium (head-body 15–22cm)

Weight

80–250g

A close relative of the black rat, closely tied to human habitation across much of Asia and now considered a distinct species from its long-time taxonomic companion.

Nocturnal and highly commensal, foraging around villages and plantations rather than in intact forest. Field separation from the closely related black rat generally requires genetic or detailed morphological comparison.

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