Brown Rat

Brown Rat - Rattus norvegicus

Alternative names
Norway rat or Common rat
Description

Brown Rats have coarse brown or brown-grey fur (occasionally black), with a paler underside. They have a long, scaly tail which is a little shorter than the head-body length which often dangles down if they are observed up high.  They have a prominent pointed snout and furless ears that protrude from the upper side of their head.  Head and body length: up to 28 cm. Weight: 200-400g.

Similar Species

Water Vole

Identification difficulty
ID checklist (your specimen should have all of these features)

A pointed snout, large protruding ears, beady eyes, brown or grey-brown fur, a long, scaly tail

Recording advice

Submit a clear photograph of key ID features to assist verification

Habitat

Almost anywhere but has adapted particularly well to live in association with humans, feeding off refuse and scraps.  Often found near barns and arable field edges in rural areas, around bird feeders and compost heaps in gardens or where food is readily discarded in urban areas.

When to see it

All year round.

Life History

Burrows and swims well (quite upright out of water compared to a Water Vole).  Life span of up to 18 months in the wild. Brown Rats breed throughout the year and can produce five litters a year. Females give birth to an average of eight young after a gestation of 22-24 days. These are weaned after 3-4 weeks.

UK Status

Common and found all over Britain except for exposed mountain regions and some small offshore islands, often subject to pest control.

VC55 Status

Common in Leicestershire and Rutland.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Additional images

All NatureSpot records