Grey Squirrels Identification Greenwich: What Signs Should You Look For?

Sound and Timing

What to look for: heavy movement - thumping, rolling, dragging, scampering with weight behind it - concentrated in daylight, particularly morning and late afternoon.

What it tells you: more than any other single sign. Grey squirrels are diurnal. Timing alone separates them from rats and mice more reliably than anything you could see.

What it rules out: activity concentrated after dark is rodents. Light, fast, high-up sound during the day, especially in spring, is more likely to be birds in the eaves.

Damage at the Roofline

What to look for: a chewed or broken edge on a soffit or fascia board, a gap at a gable verge, a displaced or lifted tile, or a hole where two roof elements meet. Fresh damage shows pale exposed timber against weathered surface.

What it tells you: the entry point, which is the thing that eventually has to be closed. Squirrels will enlarge an existing weakness rather than start from nothing, so the damage usually sits where something was already failing.

What it rules out: rats and mice rarely produce visible roofline damage of this scale. A hole big enough to see from the garden is a squirrel-sized clue.

Gnawing

What to look for: coarse gnawing on timber - joists, rafters, boarding - and on cable sheathing and plastic pipework. Broad, deep tooth marks rather than the fine nibbling of a mouse.

What it tells you: occupancy, and in the case of cable, urgency. Squirrels gnaw constantly because their incisors grow continuously, so gnawing is not a sign of hunger.

Why cable matters most: damaged insulation in a loft is a genuine fire risk. It is the one sign on this page that should change how quickly you act, and it is worth an electrician looking at it as well.

Insulation Damage

What to look for: loft insulation torn apart, compressed and gathered into a mass, usually towards the eaves. Sometimes with clear runs pushed through it between the nest and the entry point.

What it tells you: nesting rather than passing through, which means an established presence and possibly a drey with young.

What it rules out: rats and mice disturb insulation but rarely gather it in quantity like this. The scale is the distinguishing feature.

Droppings

What to look for: larger than rat droppings, more rounded and more irregular in shape, often paler and scattered rather than gathered in a run.

What it tells you: confirmation, though it is less useful than the timing of the noise. Photograph rather than handle them.

What it rules out: small dark capsule-shaped droppings collecting along a route are rats. Very small rice-grain droppings scattered in cupboards are mice.

The Drey

What to look for: a bulky ball of twigs, leaves, moss, shredded bark and - inside a building - insulation, paper and fabric. In a loft it is usually tucked into the eaves or against a chimney breast.

What it tells you: that this is a nest site rather than a through-route, and that it may contain dependent young depending on the time of year. That possibility is the strongest single reason never to block an entry point before the loft has been checked.

Cached Food

What to look for: nuts, seeds or fragments of them tucked into insulation, between joists or in a corner. Sometimes shell debris.

What it tells you: a squirrel rather than anything else - no other loft occupant caches food like this. It also explains the rolling noise people report, which is cached items moving across the ceiling.

Stripped Bark and Bare Timber

What to look for: bark stripped from branches near the property, and pale scraped areas on exterior timber.

What it tells you: squirrels active in the immediate area, though not necessarily inside your building. Useful as corroboration rather than as evidence in itself.

The Route In

What to look for: an overhanging branch reaching the roof, a fence line running to a wall, a cable, or a neighbouring roof in a terrace.

What it tells you: where the survey should start, and what the long-term fix looks like. Squirrels do not climb walls, so if none of these exists on your property the entry point may be several doors along in a terraced run.

Three Things Mistaken for Squirrels

• Rats. Nocturnal, lighter, droppings gathered along a route, and a dark greasy smear along walls and joists that squirrels do not leave.
• Birds in the eaves. Daytime and often noisy, but light and fast, concentrated at the very edge of the roof, and seasonal - mostly spring.
• Pigeons in a roof void. Heavy enough to be mistaken for a mammal, but the sound is different and there will usually be droppings and feathers at an access point.

What the Evidence Says About How Long They Have Been There

Useful for deciding how urgently to act, and for knowing what else may need attention beyond the animals themselves.

The last two rows are the ones that turn this from a noise problem into a building problem, and they are the reason an early call is worth making.