Walk into any British wood in spring and you will be surrounded long before you see a thing. The canopy is loud with voices, but to most of us it is simply "birdsong" — a pleasant blur with no names attached. Learning even half a dozen of those voices changes a walk completely. A dull stretch of hazel scrub becomes a place where a nuthatch is calling, a great tit is claiming a territory and a woodpecker is drumming somewhere beyond the oaks.

You do not need expensive kit or years of study. You need a few key sounds, a handful of markings, and the patience to stand still.

Learn the soundtrack first

Most woodland birds are heard far more often than they are seen, so start with your ears rather than your binoculars. Pick three songs to learn this month — no more. Listen to them at home, then test yourself in the field. A useful trick is to describe each song in your own words, however daft: "squeaky bicycle pump", "thin silver needle", "laughing". Those personal mnemonics stick far better than formal descriptions.

Woodland sound arrives in layers. The low, steady hum of a woodpigeon sits underneath everything. Above it come the tits, chattering in the mid-storey. Higher still, at the top of the canopy, are the fine, high notes that are easy to miss until you train yourself to hear them.

Robins: the voice that follows you

The robin is usually the first bird people learn, and for good reason. It sings for much of the year, including mild winter days, and its song is a clear, silvery warble that rises and falls, often sounding wistful or slightly melancholy in autumn and bright and confident in spring. The alarm call is a sharp, ticking "tic-tic-tic" — the sound behind many a gardener's suspicion that they are being watched.

Both males and females look alike, with the familiar orange-red breast, olive-brown back and pale belly. Despite the friendly image, robins are fiercely territorial and will see off rivals with real aggression.

Tits: small, busy and endlessly talkative

Tits are the acrobats of the wood, hanging upside down from twigs and rarely still. Learn four and you will identify most of what you hear in the canopy.

• Blue tit — blue cap, white cheeks, yellow belly and blue wings. Song is a thin, high trill that often ends in a hurried jumble of notes.
• Great tit — black head, white cheeks and a black stripe running down the belly. Listen for a ringing two-note phrase, the famous "teacher-teacher", or a repetitive squeak like a rusty gate.
• Coal tit — black cap with a white patch on the nape and a soft grey back. Its song is a high, fast, insistent version of the great tit's phrase, almost out of reach of older ears.
• Long-tailed tit — a tiny pink, black and white bird with a tail longer than its body. Listen for a rolling "tsirrup" call and constant soft contact notes as family parties move through the trees.

Nuthatches and treecreepers: the tree-trunk specialists

Two birds earn their living on bark, and both are worth watching closely. The nuthatch is compact and slate-blue above with a buff breast, a bold black eye stripe and a dagger of a bill. Its party trick is moving headfirst down a trunk, something no other British bird does regularly. Listen for a loud, clipped "chit-chit-chit" and, in early spring, a ringing whistled trill. Nuthatches plaster mud around the entrance of their nest hole to narrow it, and wedge nuts into crevices to hammer them open.

The treecreeper is smaller, brown and speckled above with a clean white underside, and creeps upwards in spirals before flitting to the base of the next tree. Its call is a very thin, high "see", easy to overlook but distinctive once learned.

Woodpeckers: drumming, yaffling and telltale traces

The great spotted woodpecker is black and white with a red patch under the tail; males also show red on the nape. Its drumming is not feeding but advertising — short bursts lasting about a second, delivered at astonishing speed on a dead branch. The call is a sharp "kik", repeated. Drumming peaks from late winter into spring, so a cold February walk can be surprisingly noisy.

The green woodpecker is a different character altogether: mossy green, with a red crown and a yellow rump, often feeding on ants in grassy clearings beside the wood. Its call is the laughing "yaffle" that once earned it the country name of yaffingale. Look, too, for neat rectangular holes in birch, scattered bark flakes and split hazelnuts — signs that woodpeckers and nuthatches have been at work.

Making the most of a country walk

• Go early. The dawn chorus peaks between late April and early June, often from around 4am to 6am, on still, mild mornings.
• Walk slowly and stop every fifty metres or so. Birds settle quickly when you stand still and stay quiet.
• Dress in soft, quiet fabrics. Rustling waterproofs will empty a wood faster than any footfall.
• Note the trees. Oak, ash, beech and hazel coppice each hold slightly different birds, and a mixed feeding flock in winter often contains several species at once.
• Learn your local patch. Knowing twenty birds well beats half-knowing a hundred.
• Follow the Countryside Code: keep to paths, close gates, and keep dogs on leads around livestock and ground-nesting birds between March and July.

Take a notebook, or simply a mental list, and add one new voice each week. Within a season a familiar walk will sound less like background noise and more like a conversation you can follow.