An Ecosystem of Boxes

Everything in nature is in orbit around something: foxes around rabbits, rabbits tugged by sandy soil, sand towards – well, wherever the ferocious Pleistocene winds heaped it back in the days when ice sheets were driving East Anglia’s climate. Ecologists, too, can be found where their favoured species live, usually being attacked by thorn-laced vegetation while tracking their target.

Dormice like bramble and low tangled branches. Surveys are seldom painless. But it is always worth it.

Dormouse2 15 Aug 21

I went back to Surrey last weekend to join the monthly box check. The nest boxes are basically backwards-facing bird boxes, usually fifty per site, and checked under licence due to the dormouse’s strict legal protections. Results for August: three adults, including two mothers with very young litters – an excellent total of ten dormice.

They are put briefly in bags to be weighed before being returned to their nests.

Dormouse1 15 Aug 21

Hazel leaves and strips of honeysuckle bark are a dormouse’s favoured materials; the birds that sometimes take over the nest boxes are bolder in their experiments. This long-abandoned nest is woven with moss, feathers and badger fur!

Bird nest Aug 21

But birds and dormice are far from the only woodland creatures that take an interest in the boxes. Despite their name, dormice are not ‘mice’ at all, but distant relations of squirrels. Real mice, such as wood mice, have hairless tails.

Wood mouse 15 Aug 21

Also unlike dormice, wood mice are lively and inclined to nip, although less so than the yellow-necked mouse, their large cousin, also in the boxes this month.

Yellow necked mouse 15 Aug 21

Shrews, toads and even snakes have been found in dormouse boxes on occasion. But mostly it is about the ones that they are put out for, raising their families and sleeping in honeysuckle bark until winter brings hibernation.

Dormouse3 15 Aug 21

Hopefully many of this month’s babies will enjoying the blackberries and hazelnuts soon.

Life at Mouse-Height

Every field is a jungle when you stand two inches tall.

Short tailed field vole 23 Oct 2017

Short-tailed field voles are more common than people in the UK, but far harder to spot because they spend their lives within dense grass. They are placid, peaceable, incomparably scruffy little creatures. They are also a crucial component of the UK’s ecosystems and support foxes, owls and many other wild carnivores.

When the vole is hiding, its grass-tunnels remain.

Small mammal run 111013

It’s often a question of looking for fieldsign when you’re trying to study rodents. I’ve been using ink tunnels in various projects over the last year – tubes designed to capture tiny footprints.

Ink tunnel tracks

These footprints belong to a mouse, probably a yellow-necked mouse. They’re a larger species than the familiar wood mouse and can be distinguished by a yellow band on their throat.

They are also obsessively fond of birdfood!

YN mouse 150406

But sometimes – just sometimes – the ink tunnels strike gold.

Tracks from Tunnel5 220916

Three upside-down triangles equals a hazel dormouse!

Dormouse photo2

I’ve recorded dormice in three sites within my parish and consider us extremely fortunate to still have them. There’s no doubt that their UK population is in real trouble, mostly due to habitat loss. They are one of our most tree-dependent mammals, as well as the sleepiest; they can easily spend six months snoozing.

This is a dormouse nest. Unlike the chaotic nest of a yellow-necked mouse, dormice will weave honeysuckle bark into a very tight ball with a cozy chamber at the centre.

DSCN1728

They hibernate at ground level, however. The temperatures have dropped steeply in the last few days and I expect most of my local dormice are now dozing. I hope they have a peaceful winter.