Capsule droppings, 8–12mm
Dark, glossy when fresh, clustered along skirtings and behind appliances. A single rat produces 30–40 droppings a day, so volume builds quickly.
The classic opener is heavy thumping in the loft after dark — heavier than mice, slower than squirrels.
Confidence rule — Capsule droppings plus night-time noise is rats almost every time. One on its own can be mice or squirrels.
Dark, glossy when fresh, clustered along skirtings and behind appliances. A single rat produces 30–40 droppings a day, so volume builds quickly.
Brown rats are nocturnal — most reports describe thumping, dragging or fighting noises between 9pm and 4am, usually directly above bedroom or living-room ceilings.
A persistent ammonia tang along skirtings or in the cupboard under the sink that doesn't shift after cleaning is rat urine soaking through plasterboard.
Tooth marks on UPVC pipework, chewed plastic conduit, and frayed cable insulation in lofts. Chewed mains cable is a category-one fire risk.
60–90mm burrow entrances near decking, sheds or compost bins outside; shredded loft insulation pulled into a hollow inside.
Time of activity is one of the fastest ways to confirm a species — daytime loft noise rules out rats, midnight kitchen scuttling rules out squirrels.
Heavy, deliberate scurrying across loft floorboards, intermittent gnawing on timber and the occasional thump as a brown rat moves between joists. If you can hear footsteps with weight, it's almost always rats — not mice.
AI-generated reference recording · not a field recording · for identification only
Heavy, deliberate scurrying across loft floorboards, intermittent gnawing on timber and the occasional thump as a brown rat moves between joists. If you can hear footsteps with weight, it's almost always rats — not mice.
Daytime sightings, or droppings in a child's bedroom — both mean the population has outgrown its hiding places.
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