Reading the Valley Skies

Fell walking and wild swimming take you into some of the best birdwatching terrain in Britain. Upland valleys act as funnels for air currents, insects and carrion, drawing in everything from buzzards to ravens. On a breezy afternoon above a tarn, or while you're changing after a dip in a river, you might see four or five large birds in the same sweep of sky. Learning to separate red kites and ravens from the more familiar buzzards and crows turns a good day out into a great one. The key is not colour but shape, flight style and sound.

Red Kites: The Fork-Tailed Soarer

Red kites are masters of slow, effortless soaring. Their wings are long and angled back, often described as looking bent at the wrist. The tail is the giveaway: deeply forked, twisting and turning like a rudder as the bird steers. From below, the pale head and white patches on the underwing contrast with darker flight feathers. A kite rarely flaps in a hurry; it drifts, rises and stalls, scanning the ground. Listen for a thin, mewing whistle – a drawn-out 'peee-ow' that carries across a valley. Unlike buzzards, which often sit on posts or soar in tight circles, kites cover ground steadily, sometimes travelling miles along a ridge. If you're swimming in a lowland river or an upland tarn, look up when you hear that mew. Kites are expanding their range across the UK, and upland valleys are now reliable places to see them.

Ravens: The Heavyweight of the Corvids

Ravens are the largest passerine in Britain, and they fly like it. Their wings are broad and fingered, and their tail is wedge-shaped – a diamond when spread. In a glide, they hold their wings in a shallow V, often rocking or rolling. The call is a deep, resonant 'cronk' or 'korrp', far lower and more wooden than a carrion crow's harsh caw. Ravens often soar alongside buzzards, but they look heavier, more deliberate, and they frequently tumble in display, closing their wings and diving before pulling out. You'll find them around crags, quarries and remote valleys, especially in the Lake District, Snowdonia and the Scottish Highlands. While wild swimming in a high tarn, a sudden cronk overhead is a reminder you're in raven country. Unlike crows, ravens rarely flock in large numbers; you'll usually see pairs or small family groups.

Buzzards and Crows: The Usual Suspects

Most large soaring birds in Britain are buzzards. They have broad, rounded wings and short, fan-shaped tails. From below, a buzzard often shows a pale chest band and dark wingtips, but the shape is the clincher: a compact, buteo silhouette, not the long, angled kite. Buzzards mew too, but their call is a plaintive, nasal 'peee-ya' repeated, often as they circle over a wood or ridge. Carrion crows are black, with a fan-shaped tail and a steady, flapping flight. They lack the raven's wedge tail and deep call. If you see a black bird soaring high on a hot day, it's probably a raven or a buzzard, not a crow – crows rarely soar for long. A good rule of thumb:

• Forked tail and mewing = red kite
• Wedge tail and deep cronk = raven
• Rounded wings, short tail, mewing = buzzard
• Fan tail and harsh caw = carrion crow

Fieldcraft for Fell Walkers and Dippers

You don't need expensive kit to improve your chances. A decent pair of binoculars – 8x42 or 10x42 – helps, but many sightings are close enough without them. Scan the sky above ridges, not just the valley floor. Thermals build along sunlit slopes, so look up when the sun comes out after rain. Early morning and late afternoon are often best for soaring birds, while midday is good for ravens tumbling. Listen as much as you look: a kite's mew or a raven's cronk will alert you before you see the bird. When you stop for a swim, keep your binoculars on a dry bag or around your neck – birds often appear while you're mid-stroke. Learn the silhouettes by practising on common birds first. A buzzard against a grey sky is a good starting point; then you'll notice when a tail looks too long or a wing looks too angled.

Watching with Respect

Upland valleys are breeding grounds as well as flyways. Red kites and ravens nest early, often in March, and disturbance can cause them to abandon eggs or chicks. Keep your distance from crags, tall trees and quarries during spring. If a bird starts calling repeatedly or flying towards you, you're too close – back off and take a different path. Wild swimming spots near nesting sites should be avoided in the breeding season; a quiet dip is no excuse for flushing a raven from its ledge. Never feed kites or ravens to get a closer look, as it changes their behaviour and can attract them to roads. Take your litter home, including food scraps, and leave no trace. The best sightings are the ones where the bird carries on as if you weren't there – that's when you know you've got your fieldcraft right.