13-17 cm – Grey-brown with lateral membrane
Wild mammal – Low risk
Flying squirrel
The flying squirrel (Glaucomys volans) is a small nocturnal mammal that glides thanks to a membrane of skin (patagium) between its front and back legs. It can enter attics and house walls, where it builds communal nests, especially in winter. Its presence is often detected by characteristic nocturnal noises.
§1Distinctive features
How to identify it
Small rodent, 13 to 17 cm long, with a visible lateral membrane on its flanks. Large black eyes for night vision. Flattened tail serves as a rudder when gliding.
§2Habitat
Where to find it
Nests in tree cavities, nest boxes and – problematically – attics, walls and insulation. Can form groups of 10-20 individuals in winter.
§3Reproduction
Lifecycle
Without intervention, an infestation can double in size in just a few weeks.
§4What to look out for
Signs of infestation
- Running and jumping noises in the attic at night
- Night-time nibbling noises in the walls
- Presence of elongated 0.5 cm droppings
- 3-4 cm entry holes in soffits or shingles
- Discovery of a winter group in the attic
§5Why act fast
Risks
- Damage to insulation and cables
- Contamination through feces and urine
- Persistent odors if individuals die in the walls
- Entry of predators (martens, raccoons) hunting squirrels
§6Prevention
How to avoid it
- Inspect and seal soffits and eaves
- Prune tree branches more than 3 metres from the house
- Install guards on nearby trees
- Check roofs and chimneys annually
§7Pro method
How MW works
Inspection
Home location and assessment.
Preparation
Customized plan – pre-intervention measurements.
Treatment
Locate main and satellite nests, treat with non-repellent baits.
Follow-up
Inspection visit – written guarantee.
§8We answer you
Frequently asked questions
How do I know it's a flying squirrel and not a red squirrel?
Nocturnal noises are the first clue – red squirrels are diurnal. The flying squirrel is also much more discreet.
Is there more than one at a time?
Yes, they live in groups, especially in winter. It’s not uncommon to find 10 to 20 individuals in the same attic.
How do you get them out of the attic?
One-way exclusion (installation of one-way gates) is the recommended method, preferably outside the breeding season.
React quickly, sleep well.
The longer the infestation lasts, the more expensive it becomes.