1 - 3 years
Length: 15 - 27cm; Tail: 10 - 24cm; Weight: 200 - 300g
Introduced, widespread and common in the UK and Ireland.
Originating in southeastern Asia, the widely adaptable brown rat is now found in much of the world, surviving in a range of habitats, particularly around areas of dense human habitation. In Ireland, the species is thought to have been introduced during the 18th Century on ships from Britain and Europe.
They are omnivorous and will eat almost anything they find. Larger than mice and similar in size to water voles, they have distinct features, including pointed muzzles and long, hairless tails.
Can survey all-year-round. Active all year. Droppings can be analysed outside of active periods.