Winter: Structure, Tracks and Sleeping Buds

From December to February a British wood looks bare, but it is far from empty. With the leaves gone you can finally read the wood's architecture: the leaning stems of hazel coppice, the dark columns of oak, the pale, peeling trunks of birch. Winter is the best time to learn trees by their buds. Oak buds cluster at the twig tips and look faintly orange-brown; ash buds are sooty black and velvety; beech buds are long, slender and sharp as a pencil. Hazel catkins begin to lengthen from January, hanging like small lamb's tails before the leaves appear.

Soft ground holds evidence of the night shift. Look for the two-toed slots of fallow and roe deer in mud, badger tracks running along established paths, and the neat, almost cat-like prints of fox. In frost or a rare dusting of snow, a whole night's wandering becomes visible.

The practical rule for winter walking is simple: stay on the main paths. Saturated woodland soils compact easily, and the fungi, invertebrates and fine roots beneath your boots take years to recover. If you volunteer with a local woodland group, this is also coppicing season. Hazel is traditionally cut on a rotation of roughly seven to fifteen years while dormant, letting light reach the woodland floor and producing straight poles for hurdles and binders.

Late Winter and Early Spring: Catkins, Snowdrops and Drumming

By February the wood is quietly gathering pace. Alder and birch catkins follow the hazel, snowdrops appear along old boundaries and tracks, and by March the first wood anemones open in the sunniest patches. The great spotted woodpecker starts drumming as early as late January — a territorial signal rather than feeding — and song thrushes and mistle thrushes sing from the tallest bare branches.

Watch for frogs and toads returning to woodland ponds to spawn, and for the first bumblebee queens searching out early flowers. This is the cheapest month to appreciate a wood: no foliage, no crowds, and every bird call carries.

Spring: Bluebells and a Closing Canopy

Nothing in the British woodland calendar compares with the bluebell weeks, usually late April into mid-May. Bluebell, wood anemone, wood sorrel, dog's mercury and ramsons are all ancient woodland indicators — plants that spread so slowly they generally signal a wood that has been continuously wooded for centuries. Treat them accordingly: photograph freely, pick nothing, and keep to the path so the bulbs are not trampled.

The canopy closes fast. Oak usually leafs in late April or early May, ash a little after, and once the leaves are out the woodland floor loses most of its light. Migrant birds arrive on cue: chiffchaff from mid-March, blackcap and willow warbler in April, and in western oakwoods the pied flycatcher. Hedgerows and woodland edges fill with nesting activity.

Between March and July, keep dogs on a short lead near dense undergrowth. Ground-nesting birds such as woodcock, nightjar and willow warbler are easily disturbed, and a single loose dog can clear a nesting wood in an afternoon.

Summer: Under a Green Ceiling

By June the wood is deep and shuttered, and the wildlife moves up into the canopy or out into the rides and glades. This is butterfly season. In oakwoods, look for purple hairstreak around the treetops and purple emperor in July, particularly around sap runs and damp tracks; white admiral patrols honeysuckle in sunny clearings. Silver-washed fritillary favours bramble and violet-rich rides.

Dusk is the reward for a late walk. Pipistrelle bats flit along rides within half an hour of sunset, noctules fly high and fast above the canopy, and Daubenton's bats skim low over woodland streams. Nuthatches, treecreepers and second broods of tits keep the wood noisy through July.

Be prepared, though. Midges and ticks are at their worst now, so wear long sleeves and trousers, use repellent, and check yourself properly afterwards. Tick bites should be removed promptly with fine tweezers.

Autumn: Mast, Fungi and Golden Light

Autumn is the wood's harvest. Acorns and beech mast drop from September, hazelnuts ripen earlier, and rowan and hawthorn berries feed thrushes arriving from Scandinavia. Jays bury thousands of acorns, some of which become next century's oaks; dormice and squirrels fatten quickly on the same crop.

Fungi fruit in the damp weeks from September to November — fly agaric under birch, penny buns and chanterelles in older woodland. Unless you genuinely know your species, admire rather than collect; many fungi are protected, and the fruiting bodies feed deer, slugs and small mammals.

Colour arrives in waves. Field maple and birch turn first, beech follows with copper and bronze, and oak holds brown leaves well into winter. Fallen leaves are not litter to be tidied but the beginning of soil; leave them where they fall.

Seasonal Tasks and Simple Ways to Help

• Winter: join a coppicing, hedge-laying or path-clearance work party; plant bare-root native trees between November and March.
• Spring: record first sightings — first bluebell, first chiffchaff — and report them to a local recording scheme.
• Summer: keep to paths, keep dogs close, and leave deadwood standing or lying; it supports beetles, bats and fungi.
• Autumn: collect seed from local provenance trees if your group is planting, and clear nothing but litter.

Do one thing steadily across the year and the wood will teach you more than any book: the exact week the oak breaks bud, the day the first warbler returns, the first frost that ends the fungi. That accumulated noticing is what turns a pleasant walk into a lifelong relationship with a place.