Why Spring Matters So Much for Garden Birds

By the middle of March, the garden begins to sound different. Great tits start their two-note call, blackbirds are scrapping over territory, and the first dunnocks are slipping through the base of the hedge looking for somewhere discreet to build. This is the nesting season, and for our garden birds it is the most demanding few months of the year. A pair of blue tits may make several hundred trips to a nest box in a single day, feeding chicks that can double in weight within a week.

The good news is that a great deal of what helps them is entirely within our control. You do not need a large garden, expensive equipment or any specialist knowledge. A few thoughtful habits between March and July can make the difference between a brood that thrives and one that fails.

Offer a Proper Supply of Nesting Material

Birds are remarkably resourceful, but a reliable supply of clean, dry material close to a potential nest site saves them valuable energy. Rather than scattering it on the lawn where it will dampen, tuck small bundles into the crooks of branches, into a hanging feeder cage, or into an old fat-ball holder you have cleaned out.

• Dry moss and dead grass gathered from a quiet corner of the garden, left in loose handfuls.
• Short lengths of wool — no more than 10cm, so there is no risk of a bird or chick becoming tangled.
• Animal fur from a brush, provided your pet has not been treated recently with a flea product.
• Feathers, straw and fine twigs, which give structure to the cup of the nest.

Do avoid anything synthetic or overly long. Dryer lint holds moisture, plastic twine and long strands of string are genuine hazards, and human hair is fine enough to wrap around a bird's legs. If in doubt, natural and short is the rule.

Leave the Hedges Alone Until Late Summer

This is the single most important thing you can do. Under the Wildlife and Countryside Act 1981, it is an offence to intentionally damage or destroy the nest of any wild bird while it is in use or being built. That means a quick tidy-up of an overgrown hedge in May is not just unkind — it can be unlawful.

If a hedge genuinely must be cut, February is the last safe window before birds begin prospecting, and September is the first safe point after the breeding season has wound down. In between, leave it be. Ivy, brambles and dense shrubbery are not untidiness; they are some of the best nesting habitat in the country, and a thick hedge will also give fledglings cover from predators in their vulnerable first few weeks.

Keep Cats and Other Predators at a Distance

Cats take an enormous toll on young birds in spring, particularly fledglings that have left the nest but cannot yet fly well. If you have a cat, a collar with a quick-release bell makes a real difference, and keeping it indoors from dawn until mid-morning and again in the evening covers the peak hunting hours. A covered litter tray and a well-stocked indoor scratching post reduce the urge to patrol outside.

For the garden itself, think about placement. Feeders and nest boxes sited close to thick, prickly shrubs give birds a safe escape route, while those positioned near a low fence or open lawn give cats an easy ambush point. Sprinkling spiky cuttings — holly, hawthorn or gorse — around the base of a feeding station is a simple, humane deterrent.

Food, Water and a Quiet Corner

Adult birds feeding chicks need high-energy, high-protein food, and they need it close to the nest. Sunflower hearts, suet pellets and mealworms are all excellent choices in spring. Whole peanuts should only ever be offered in a rigid mesh feeder, never loose, as they are a choking hazard for small chicks.

Water matters just as much as food. A shallow dish with a few pebbles in the bottom allows birds to drink and bathe without risk of drowning, and it should be cleaned and refilled daily during warm spells. Finally, resist the urge to tidy every corner. A patch of long grass, a log pile and a few nettles left to grow will support the caterpillars and aphids that parent birds rely on to feed their young — the very insects that a manicured garden cannot provide.

What to Do If You Find a Nest or a Fledgling

If you discover a nest while gardening, retreat quietly and leave it undisturbed. Check nest boxes only briefly, and never after the eggs have hatched. A fledgling on the ground, looking scruffy and helpless, is almost certainly not abandoned — its parents will be nearby, waiting for you to move away. Keep cats indoors for a few days and let nature take its course.

Small acts, repeated across thousands of gardens, add up to something significant. Give the birds a little space, a little material and a little protection this spring, and you will be rewarded with the busiest, noisiest, most rewarding few months the garden has to offer.