Why Winter Asks So Much of Your Garden Birds

By December, the birds visiting your garden are no longer the same birds you watched in June. Summer's abundance of caterpillars, aphids and soft fruit has gone, and the residents that stayed — robins, blue tits, great tits, blackbirds, dunnocks, wrens, goldfinches and the rest — are living on a knife edge of energy. A small bird can lose a significant proportion of its body weight on a single frosty night, and every dawn is a race to replace those calories before dusk falls again.

The good news is that a modest, well-planned garden can make an enormous difference. Clean feeders, unfrozen water and a few sheltered corners are often all it takes to turn a marginal patch into a genuine winter refuge. Here is how to prepare, roughly in order of how much difference each step makes.

Feed Well, and Feed Clean

Winter food needs to be energy-dense. Fat is the currency of cold weather, so prioritise suet balls, suet blocks and fat-rich seed mixes over cheap fillers like wheat and barley, which many birds simply discard. Sunflower hearts are the single most useful all-round food: high in oil, no husk to waste, and taken by almost everything from tits to greenfinches. Nyjer seed suits goldfinches and siskins, while mealworms — dried and soaked, or live — are irresistible to robins, wrens and pied wagtails.

Blackbirds, song thrushes and fieldfares prefer to feed on the ground, so scatter a little fruit, soaked raisins or chopped apple beneath a shrub where they feel safe. Never put out bread and milk, salted peanuts, or anything mouldy.

Hygiene matters even more in winter than in summer. Birds crowd together at feeders when natural food is scarce, and damp, mild spells between frosts allow bacteria and mould to flourish. Damp, clumped food — especially old peanuts — can carry toxins that kill. So:

• Clean feeders every fortnight, and weekly in wet weather, using hot soapy water and a bottle brush. Rinse thoroughly and allow to dry completely before refilling.
• Discard any food that looks damp, clumped or furry, and never top up on top of old food.
• Move feeders a metre or two every few weeks so droppings and spilled seed do not build up in one spot.
• Provide several smaller feeding stations rather than one large one, which reduces crowding and squabbling.

Squirrel-proof, weather-proof feeders are worth the investment — food that stays dry stays safe, and a baffle saves a great deal of waste.

Water: The Overlooked Essential

In hard frost, natural water disappears and birds cannot extract moisture from dry seed. They need to drink, and they need to bathe to keep feathers in good insulating condition. A shallow dish, no more than 5cm deep, with a stone or two for grip, placed in a sheltered spot, will be used constantly.

Check it each morning and break the ice — never pour boiling water directly into a frozen dish, as the thermal shock can crack it. Filling with lukewarm water in the morning and again in the early afternoon helps. Avoid adding salt, glycerine or antifreeze, all of which are harmful.

Offer Shelter and Roosting Places

Shelter is where many gardens fall short. Dense, evergreen structure gives birds somewhere to escape wind, rain and predators, and somewhere to roost. Ivy is superb — it flowers late for insects and its berries feed thrushes in late winter. Holly, yew, cotoneaster and pyracantha all combine cover with fruit. If you have a bare corner, a mixed native hedge of hawthorn, blackthorn and hazel will repay you for decades.

Nest boxes are not just for spring. Blue tits, great tits and even wrens will roost in them on cold nights, sometimes several birds huddled together. A box facing between north and east avoids the worst of the prevailing wind and driving rain. Purpose-made roosting pockets, tucked into a sheltered wall or shrub, are readily used by wrens and tits as well.

Resist the urge to tidy everything. Seed heads left standing, a pile of leaves in a quiet corner, and a stack of old logs provide both invertebrate food and hiding places. Wrens in particular will work through a leaf pile like a small, furious mouse.

Keep Birds Safe While They Feed

A well-stocked garden attracts predators as well as visitors, so a few simple precautions are worthwhile.

• Position feeders within two metres of a shrub or fence — close enough for a quick escape, far enough that cats cannot lie in ambush right beside the food.
• Keep cats indoors at dawn and dusk, when birds are most active and least alert.
• Clean up spilled seed regularly, as it attracts rats and can spread disease.
• Leave a gap in the feeding routine if you spot an obviously sick bird, and clean everything thoroughly before resuming.

Small Efforts, Big Returns

Preparing your garden for winter is not an elaborate project. A full feeder, a clean bird bath that stays ice-free, and one dense shrub left unpruned will support more life than most people imagine. Start with the feeders and water this week, add shelter as you can, and by the time the first hard frost arrives your garden will already be the most reliable larder on the street.