IdentificationModerate risk
What Is the Noise in My Ceiling at Night?
Quick answer
Scratching, scurrying or gnawing in the ceiling at night is most often rats or mice. Heavier thumps and loud movement, especially around dusk, can be possums, which are protected wildlife. Birds and insects are also possible. Checking for droppings and the timing of noises is the quickest way to narrow it down.
Why this happens
Rodents are most active in the first hours after dark and again before dawn. Their scratching and running on ceiling linings carries clearly into rooms.
Possums are much heavier and often make thumping, hissing or screeching sounds. They typically leave at dusk and return before dawn. Possums are protected in Australia and must be managed according to state wildlife rules, usually by licensed catchers.
What you may be seeing
- Small droppings (rats and mice) versus larger, pellet-like droppings and strong urine smell (possums).
- Gnaw marks on wiring or timber (rodents).
- Noises moving along walls and cornices (rodents).
What you can do
- Note the time and type of noise over a few nights.
- Check the roof void from the manhole with a torch for droppings and nesting.
- If rodents, trap along runways and seal entry points.
- If possums, contact a licensed possum catcher and follow state wildlife regulations.
What not to do
- Do not trap or bait possums; they are protected.
- Do not use rodent bait where possums or pets could reach it.
When professional help may be needed
If you are unsure what is in the ceiling or cannot safely inspect it, a pest professional can identify the animal and recommend the right approach.
Related pest
Rats
Introduced rodents that live alongside people, nest in roofs, walls and gardens and gnaw through building materials and wiring. Roof rats are the most common household rat in many Australian cities.
Mice
Small, curious rodents that squeeze through tiny gaps, nest in walls, cupboards and appliances and breed quickly. The introduced house mouse causes most household problems.
Species mentioned
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Local information
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Sources & further reading
- Australian Museum — insects and spiders — Australian Museum
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