As summer fades and the air begins to cool, September brings the first signs of autumn, shorter days, falling leaves, and a noticeable change in pest behaviour. While many people think of pests as a summer problem, the reality is that autumn marks the start of a new wave of activity, as insects and rodents begin seeking warmth and shelter for the colder months ahead.
At ASW Pest Control, we often see an increase in pest-related callouts in September as pests move indoors or become more visible outdoors. Here’s what to expect – and what to do if you spot something suspicious.
Why Autumn Brings a Shift in Pest Activity
As the temperature starts to drop and food sources become less reliable outdoors, many pests begin to search for indoor shelter. Your home or business, especially if it’s warm, has accessible food or entry points, can be very attractive.
Falling leaves and garden debris also create perfect hiding spots for pests like rats, mice, and insects. Blocked gutters, compost heaps, wood piles, and undisturbed sheds can all become breeding grounds.
Rodents Begin Moving Indoors
September is often when rats and mice begin shifting from gardens and fields into homes, garages, and lofts. They’re looking for dry, warm spaces to nest and will exploit even the smallest entry points around pipework, vents, or gaps under doors.
Signs to watch for:
– Scratching noises in walls or ceilings
– Droppings in cupboards or along skirting boards
– Gnaw marks on cables, packaging, or furniture
Insects Change Behaviour
You might also notice a shift in insect activity. Ants, spiders, cluster flies, and even wasps begin behaving differently in early autumn. Wasps may become more aggressive as their nests reach the end of their life cycle. Spiders can become more visible indoors as mating season begins. Flies (especially cluster flies) may gather on south-facing windows or roofs looking for entry points to hibernate, and ants that entered homes in the summer may still be active if food sources are present
Garden and Outdoor Pests
Squirrels, birds, and even moles may become more disruptive in autumn as they forage more actively and begin preparing for winter. Rodents and insects may also use compost heaps, wood piles, or garden waste as temporary shelter before moving closer to buildings.
What to Do If You Spot a Pest
If you notice signs of pest activity, indoors or outside, don’t wait. Autumn infestations can be harder to spot at first but escalate quickly once pests find warmth and shelter.
Here’s what you can do:
– Don’t ignore the signs – unusual noises, droppings, or damage are often early indicators
– Seal entry points – check vents, pipes, and external gaps before the colder months set I
– Clear up leaves and debris – avoid letting garden waste pile up near building.
– Store food securely – in airtight containers, including pet food
– Contact a professional – especially for rodents, wasps, or repeat insect issues
How We Can Help
We offer fast, discreet and effective pest control tailored to the season. Whether you’re dealing with rodents indoors or garden pests preparing to move in, we’re here to help.
- Same-day or next-day callouts
- Internal and external proofing
- Safe, professional treatments for homes and businesses
- Seasonal advice and long-term prevention plans
Call 0800 592011 or get in touch online if you’re seeing any signs of pest activity this September.
Stay Ahead of Autumn Pests
The shift into autumn is beautiful, but also a busy time for pests. A little early action can prevent a much bigger issue later on. If in doubt, give ASW a call. We’re here to help you stay pest-free all year round.
