Why Winter Tests Every Bird in Your Garden

A blue tit weighs little more than a two-pence coin, and a single freezing night can burn through a tenth of that body weight. From November onwards, garden birds are running the same calculation every day: take in enough energy to survive the dark, then start again at first light. Short days leave only a few hours for feeding, and when the ground is frozen solid or sodden, the worms, grubs and spiders that robins and thrushes depend on simply disappear underfoot.

That is where a thoughtful garden earns its keep. Food with real fat in it, water that has not turned to ice and a dense corner to hide in can be the difference between a bird scraping through and a bird arriving in spring in good condition. None of it is expensive, and most of it takes minutes a day once you are in the habit.

Fat Is Fuel: What to Put Out

In cold weather, calories matter far more than variety. A bird's survival strategy is to lay down fat during the day and burn it overnight, so the richest foods do the most good.

• Suet balls, blocks and pellets — the highest-fat option you can offer. Vegetable suet holds together well and will not smear feathers the way soft animal fat can.
• Sunflower hearts — no husks to wrestle with, so more energy for less effort. Almost every garden species will take them.
• Peanuts — always unsalted, and always from a supplier that tests for aflatoxin. Serve them in a mesh feeder so tits can chip off manageable pieces.
• Mealworms — dried ones soaked for twenty minutes in warm water are irresistible to robins, wrens and blue tits, especially on frosty mornings.
• Fruit — halves of apple or pear on the ground or pushed onto a branch bring blackbirds, song thrushes, redwings and fieldfares into the open.
• Sensible extras — a little grated mild cheese, cooked rice or potato, and dry porridge oats are all fine in small quantities.

What you leave out matters just as much. Never put out salted or dry-roasted nuts, bread, milk, or fat left from roasting meat; the salt and the greasy texture do more harm than good. Bin anything mouldy, and never leave food sitting in a feeder until it turns wet and claggy.

Water: The Essential Nobody Thinks About

Birds need to drink even in hard frost, and bathing is how they keep their plumage in the condition that makes it such effective insulation. Fluffed feathers trap a layer of warm air against the skin; feathers clogged with grime cannot do that. When every puddle and ditch is locked under ice, a bird bath or pond becomes a genuine lifeline.

• Keep the water shallow — a couple of centimetres is plenty. Add a few clean stones for grip and to give small birds somewhere to perch.
• Defrost twice a day in a cold snap, in the morning and again in the early afternoon. Pouring on warm water is the simplest and safest method.
• Never add antifreeze, glycerine or salt to keep the surface open. All are harmful, and some are lethal.
• Scrub the bath regularly with hot water and a bird-safe disinfectant, then rinse well.
• Position it away from places where a cat can crouch unseen, but close enough to shrubs that birds can dash for cover.

Somewhere Safe and Warm to Spend the Night

Roosting is the half of winter survival that most of us never see. Birds need somewhere out of the wind and rain where they can sit tight until dawn, and dense cover is worth as much as any feeder.

• Evergreens — ivy, holly, yew and pyracantha give year-round shelter and hide insects. Ivy is superb: thick, insulating and alive with small invertebrates.
• Native hedges — hawthorn, blackthorn and hornbeam, left thick and unclipped, offer a warm lattice of twigs.
• Roost boxes — an ordinary hole-fronted nest box (32mm for blue and great tits, 25mm for coal tits) is often used by several birds huddled together on the coldest nights.
• Log piles, leaf heaps and brash — tucked into a quiet corner, these shelter wrens, dunnocks and a good deal else besides.

Put the secateurs away during a cold spell. Cutting back ivy, hedges or dead stems strips away insulation exactly when it is needed most, and long-tailed tits and wrens will happily huddle side by side in whatever dense tangle you leave them.

Consistency, Cleanliness and a Few Finishing Touches

Birds learn where food appears and will build your garden into their daily rounds, so try to top up at the same times each day. An extra handful in the afternoon is especially valuable, giving them something to digest before the long night. Clean feeders every fortnight with hot soapy water, dry them thoroughly, and rotate feeding stations to stop droppings building up underneath. If you notice a bird looking fluffed up, dull and unusually tame — signs of disease such as trichomonosis in finches — take the feeders down for a fortnight and give everything a thorough clean.

A wilder corner helps too. Leave seed heads on teasels and sunflowers, let a patch of lawn grow a little shaggy, and resist the urge to tidy every fallen leaf. Keeping cats indoors at dawn and dusk spares a great many birds, and a simple dish of water placed beside the feeders means they need not choose between eating and drinking. Do these few small things and your garden becomes what it should be in winter: a genuinely useful piece of countryside, doing its bit on the coldest nights of the year.