Two holes in a hedge bank can look much alike from the far side of a field. Walk closer and the differences stack up fast. Badgers and rabbits both dig into well-drained slopes, both like the shelter of a hedgerow or a woodland edge, and both often turn up on the same farm, sometimes a few metres apart. The trick is not to stare at the hole itself but at everything around it: the size of the opening, the soil heaped outside, the width of the worn path leading in, and the droppings that are never far away.

Start with the setting

A badger sett is usually dug into ground that drains well: a woodland bank, a hedgerow bank, the side of a disused railway embankment, or the soil beneath a mature tree's roots. Badgers are heavy, wary animals and they like the security of deep cover, so setts often sit at the edge of woodland or under a thick hedge, with good earthworm pasture close by.

Rabbit warrens appear in similar spots, but also in the open: sandy banks, dunes, railway cuttings, dry corners of fields and the free-draining soil under a fence line. If the ground around the holes is grazed down to a close, even lawn with small round pellets scattered across it, rabbits are the better bet. Setting narrows the odds. It does not settle them.

Entrance size and shape

Badger entrances are the most reliable single clue. A badger is a low, broad animal, roughly the width of an adult's boot across the shoulders, and its tunnel is built to match. A typical sett entrance measures about 25–30cm across and is noticeably wider than it is tall, giving a flattened oval or D-shape. The rim often looks worn and polished from years of badgers squeezing through, and you may see claw marks in the soil above the opening.

Rabbit holes are about half that size: a circle of roughly 10–15cm, snug for a large rabbit. The bottom edge is often flattened and smoothed where rabbits have worn it down. If the opening looks wide enough to post a rugby ball through, think badger. If a fist or a large mug would fill it, think rabbit.

A quick field check: lay your hand flat across the opening. A rabbit hole is about a hand's width. A badger sett entrance is closer to two.

What the spoil heap tells you

Badgers shift serious quantities of soil, and they push it out backwards, so it fans away from the entrance in a broad, sloping mound. On a well-used main sett those heaps can be enormous, with coarse soil, stones and roots mixed in. The freshest digging looks darker and softer than the rest, and you will often find bedding dumped nearby: bracken, dry grass, moss or leaves. That is the giveaway. Rabbits do not leave bedding outside their doors.

Rabbit spoil tends to be smaller and more scattered, or missing altogether, and looks finer and dustier. Rabbits also dig shallow scrapes, which leave an untidy patch of loose soil rather than a proper heap.

Tunnel shape and the size of the system

You rarely see the tunnels, but the entrance hints at what lies behind it. A badger tunnel runs around 25–30cm in diameter, oval in section and wider than it is high. It goes deep, often several metres, into a network of interconnecting passages and chambers. A main sett can have many entrances, with annexes, subsidiary setts and single outlying holes nearby.

Rabbit tunnels are much smaller, roughly 10–15cm across, and usually shallower, though a long-established warren can still be extensive. Rabbit burrows tend to cluster tightly in one bank or hedge bottom, while badger entrances are usually spread across a wider area, linked by well-worn paths.

Field signs that finish the argument

Size and shape will get you most of the way. The signs around the holes settle it:

• Latrines. Badgers scrape shallow pits in the soil, often near the edge of the sett or beside a main path, and use them repeatedly. The droppings are dark, soft and untidy, sometimes packed with seeds or insect remains.
• Wide paths. Badger runs are broad and deeply worn, about a boot-width across, often cut through grass and bracken. Low fences and overhanging branches catch coarse badger hairs, boldly banded black and white.
• Snuffle holes. Small conical pits in pasture where badgers have rooted for earthworms, usually on grassland close to the sett.
• Prints and scratches. Badger tracks show five toes, a broad pad and clear claw marks in front of the toes. Vertical claw marks on tree trunks and fence posts are another regular find.

Rabbit signs are smaller and tidier: hard round pellets scattered or piled in little heaps, narrow runs about 10cm wide, turf nibbled down to an even lawn, and neat angled cuts on plant stems. Rabbit footprints show four toes with no claws in front.

When both use the same bank

Badgers and rabbits do not respect each other's architecture. Rabbits will dig into the loose spoil at the edge of an old sett, and a badger will enlarge an old warren or take over a fox earth. Foxes, for their part, enlarge rabbit burrows and leave droppings that are twisted and pointed, usually with fur or bone in them. Weigh the evidence rather than pinning everything on one hole. The largest, freshest excavation, with wide paths leading in and a latrine nearby, is a badger sett even if a rabbit hole or two sits alongside it.

How to check without disturbing anything

You can identify most setts and warrens from a few minutes of careful looking, and it is worth doing it that way. Watch from a distance, ideally in the early morning or late evening, and count the entrances you can see. Compare each opening with your hand or boot rather than guessing. After rain, check muddy patches for prints, and look for fresh soil and dragged-out bedding.

Do not dig, block, fill or otherwise interfere with a sett. Badgers and their setts are protected by law in the UK, and work that affects a sett in use can require a licence. If you need to do anything near one — fencing, tree work, drainage, building — take advice from the relevant statutory body (Natural England, Natural Resources Wales, NatureScot or DAERA in Northern Ireland) and, where it matters, from a qualified ecological consultant.

Finally, write it down. Note the grid reference, the date, how many entrances you counted and what you saw. Local record centres and county badger groups rely on those notes, and a well-kept record is often more useful than the sighting itself.

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