Watching Barn Owls at Dusk in the Countryside

Why Dusk Is the Hour That Matters

Barn owls are birds of the quiet half-hour. In summer you might catch one hunting well before sunset, especially if there are young in the nest, but the reliable window is the last hour of daylight through to about half an hour after the sun has gone. In winter, when voles are scarce and the nights are long, a hard frost or a run of wet weather can push them out to hunt in broad afternoon light — a cold snap is often your best chance of seeing one while there is still enough light to watch it properly.

Weather shapes everything. A light breeze ruffles the grass and helps the birds, because voles cannot hear them coming as easily. A still, muggy evening is quieter. Strong wind and heavy rain keep them tucked up in the roost, and so does a bright moonlit night, when they can hunt quite happily without ever showing themselves in daylight. Clear evenings after a spell of damp, cool weather are the ones to put in the diary.

Reading the Field Margins

Barn owls do not need wilderness. They need rough, tussocky grass full of field voles, a roost or nest site nearby, and enough openness to quarter low over the top. The best places are often the least tidy ones.

• Field margins left uncultivated, particularly the wide headland strips along a hedge or fence line.
• Rough grazing and unimproved pasture with uneven, tufty ground rather than close-cropped turf.
• Ditch banks and old hedge lines, where the vegetation grows long and rank.
• Rough corners and awkward patches — wet hollows, slopes too steep to plough, land beside a pond or stream.
• Set-aside strips and over-wintered stubbles, which hold good numbers of small mammals through the colder months.

Look for a fence post, gatepost or a bare branch they habitually use to pause and scan. Owls are creatures of habit, and once you find a favoured perch, you can often predict where a bird will appear. Also look for white splashes of droppings on posts and fence rails, and for dark, sausage-shaped pellets beneath them — both are sure signs that the margin is being worked regularly.

Setting Yourself Up Without Being Noticed

Arrive about forty minutes before you expect the first bird to move. That gives you time to settle, and it gives the owls time to forget you are there. Walk quietly along a hedgerow rather than across open ground, and use the hedge to break up your outline against the sky.

Wear dark, dull clothing — no white waterproofs, no rustling fabric, no bright rucksack. Stand or sit still, close to a gate or a thick stretch of hedge, and keep low. Owls are alert to movement above almost anything else, but a motionless figure under a hedge is quickly dismissed as part of the landscape.

Once a bird is hunting, keep a respectful distance. Thirty to fifty metres is sensible in open country; if the owl changes its line, looks up at you or drifts away, you are too close. Avoid anything that pulls a bird off its hunting, including playing recorded calls, which takes energy the bird cannot spare, particularly in winter or when there are chicks to feed.

Leave the torch in your pocket. A torch beam can dazzle a hunting owl and disrupt its night vision for several minutes, which matters when every hunting hour counts.

What You Are Looking For

The flight is the giveaway. A barn owl quarters: it works back and forth across the field in a slow, deliberate pattern, flying low with deep, buoyant, almost moth-like wingbeats — pale beneath, buff and grey above, with a long, blunt head and no ear tufts. The look is soft and unhurried, quite unlike the jerky bounding of a kestrel or the stiffer, more direct flight of a tawny owl.

Watch for the hovering pause, when a bird hangs over a patch of grass with its head down, then drops in a steep, almost silent fall. If it is successful, it will usually rise with something small and dark in its talons and fly straight off to the nest, often returning within ten or fifteen minutes. Learning that flight line is the key to a good evening — position yourself between the hunting field and the likely nest site and the birds will pass close by.

Listen as well. Barn owls have no hoot; the call is a long, harsh, drawn-out screech, often heard just as a bird launches from a post. The young birds make a rasping, snoring hiss from the nest hole, which you may hear faintly from a lane nearby.

Keeping the Encounter Kind

The privilege of watching is entirely dependent on the birds staying undisturbed, so a few habits are worth keeping.

• Stay on public rights of way or ask the landowner's permission before entering fields. Most farmers are glad to point out where the birds are hunting.
• Keep dogs on a lead and well away from the margins.
• Never approach a nest hole, roost tree or barn, and never linger near a building you suspect holds a nest.
• Avoid using playback, and never shine a light into a roost or nest.
• Report what you see to your county bird recorder; casual records of hunting birds help build a picture of where the species is doing well.

Take a flask, wear more layers than you think you need, and give the evening time to unfold. The moment a pale shape slips along the hedgerow in the last of the light, quartering the rough grass with that silent, floating flight, is worth every bit of the waiting — and it will send you home already planning the next mild, breezy evening.