How Do Wild Birds Keep Cool in Summer?

Wild birds keep cool by seeking shade, reducing activity in the hottest part of the day, bathing and losing heat through evaporation. Some pant; others flutter the tissues in their throat. These responses help regulate body temperature, but they do not make birds immune to extreme heat.

For a UK garden, useful help starts with shelter and a carefully maintained water source. Water can also spread infection, so providing it comes with a daily cleaning commitment. The advice below is for UK gardens.

How do birds lose excess heat?

Birds do not sweat as we do. Panting moves air over moist respiratory surfaces, allowing evaporation to carry heat away. Gular fluttering is a related but distinct action: birds such as cormorants and herons rapidly move the throat tissues. It is not simply another name for all bird panting.

Shade reduces exposure to direct sun, while resting reduces the need for activity during the hottest hours. Bathing can help birds cool down and maintain their feathers. The RSPB's explanation of bird cooling behaviours describes these different responses. A bird with an open bill may be cooling itself, but that sign alone cannot establish that it is healthy.

“Birds can’t sweat so, like dogs, some pant instead.”

Is a bird with spread wings always too hot?

No. Blackbirds and robins sometimes sunbathe with fluffed body feathers and one or both wings spread. BTO's guide to feather care and sunbathing describes this as routine feather maintenance. It is thought to help preen oil spread and drive parasites out of the plumage; these are proposed benefits, rather than a reason to diagnose every spread-wing posture as harmless.

The posture alone cannot tell you whether a bird is overheating or unwell. Watch from a distance and use the warning signs in the section below if it appears injured or unresponsive. Do not approach simply to interrupt sunbathing.

Should you put out water during hot weather?

Check what is already available nearby. The RSPB's current UK garden-bird guidance favours ponds and recommends a birdbath only where there is no local pond and you can replace the water every day. Shared water can transmit trichomonosis, a disease affecting garden birds.

Use fresh tap water under that guidance, with one qualification: check your water company's treatment information. Where tap water is chloraminated, the RSPB advises an elevated bath, or rainwater collected in a covered water butt for a ground-level bath. This distinction matters when choosing both the water and the position.

Food is a separate decision from keeping birds cool. Current UK advice is to pause seeds and peanuts from 1 May to 31 October. Our spring and summer feeding guide explains the seasonal choices.

How can you make a birdbath useful and manageable?

1. Choose a shallow, stable container. Birds need somewhere to stand and an easy route out. Stones can provide perches and shallower access; avoid making small birds enter deep water to reach a drink.

2. Keep an open view around it. Nearby shrubs or trees offer escape cover, but the bath should not be hidden inside vegetation where birds cannot see their surroundings.

3. Empty and refill it daily. Remove debris and replace the water instead of repeatedly topping up dirty water. Check again in hot weather because evaporation can empty a shallow dish quickly.

The Natural History Museum's birdbath guide illustrates a simple saucer-and-stones design. Choose a setup you can lift and clean comfortably: elaborate equipment is little help if daily upkeep becomes difficult.

What if birds look ill around the water?

Follow BTO's garden hygiene advice: clean and disinfect baths regularly, for example weekly, using a suitable product at its labelled dilution. Remove dirt first, rinse thoroughly and let the container air-dry before refilling. Keep dedicated cleaning equipment outside, wear gloves and wash your hands afterwards.

When does a bird need help?

Watch quietly from a distance. An open bill alone is not a diagnosis, but an adult that cannot balance, has visible injuries or appears unresponsive needs prompt advice from a wildlife rehabilitator or vet. Keep pets away and do not pick up a visibly sick bird before seeking advice.

The RSPCA's sick and injured bird guidance, for England and Wales, explains warning signs and precautions. Elsewhere in the UK, contact a local wildlife rescue or vet. Do not delay a call because you assume the bird is merely hot.

Make shelter part of the garden

Retain leafy cover where birds can retreat undisturbed. Our guide to attracting birds to your garden explains how planting fits into a wildlife-friendly space. For shelter after sunset, see where birds roost at night.

As a practical garden check, note whether birds have shade, whether any water you provide is clean, and whether you can keep up that care tomorrow. There is no need to approach a resting bird to test its response.