How to identify it
Also called black rat, ship rat. Work down these in order — the first one is usually enough on its own.
- Tail longer than head and body combined — the key separator from Norway rats
- Slender build, pointed nose, large ears and large eyes
- Droppings about half an inch with pointed ends
What it gets mistaken for
Most people arrive at a pest name by ruling things out. These are the ones that genuinely look similar, and the detail that separates them.
Where you will find it
- Attics, especially in older neighbourhoods with mature tree cover
- Soffits, roofline junctions and gable vents
- Wall voids, entered from above
- Palm trees, ivy and dense vegetation outdoors
Signs it is already there
You will nearly always see the evidence before you see the pest itself.
- Scratching or scurrying overhead at night, often moving along a line
- Droppings in attic insulation, clustered along travel routes
- Dark greasy rub marks along beams and wall tops
- Gnaw damage to wiring or pipe insulation
High. Costly or fast-moving if it is left alone.
Why it is harder to deal with than it looks
They are excellent climbers and enter high, so ground-level sealing misses the actual route. Any limb touching the roof is a bridge, and so are fences and utility lines running to the structure.
What actually works
Cut back every limb within a few feet of the roof, then seal roofline junctions, soffit and gable vents with hardware cloth. Trap after or alongside sealing, never seal first while animals are inside — that causes an odour problem in a wall cavity.
Common questions
How do I tell a roof rat from a norway rat?
Norway rats are heavier and stockier with a blunt nose, smaller ears, and a tail shorter than the body. They also live low rather than high.
How do I tell a roof rat from a house mouse?
A mouse is far smaller with rice-sized droppings; roof rat droppings are closer to raisin-sized.
Where are roof rat usually found in a home?s
Attics, especially in older neighbourhoods with mature tree cover Soffits, roofline junctions and gable vents Wall voids, entered from above.
Is a roof rat dangerous?
Chewed wiring carries a genuine fire risk independent of the infestation. Raise it as a priority when booking. Droppings and urine are a health consideration in an enclosed attic.
Identification guidance only. Under Texas law, applying pest control treatments for hire requires a licence from the Texas Department of Agriculture. This page describes what a pest looks like — it is not a diagnosis of your property or a treatment recommendation for it.