When we think of owls, we often picture them braving chilly forests or snowy landscapes. But what happens when the temperature rises? Summer nights can be uncomfortably warm — even for these night-loving raptors. So, how do owls stay cool?
1.Built-in Temperature Control: Their Feathers
Owls have thick, fluffy feathers that help keep them warm in the winter. But these same feathers can also help them cool off in the summer. When it’s hot, owls can puff up their feathers and change their posture to let more airflow over their skin. This helps carry heat away from their bodies, a bit like how we feel cooler when a breeze hits our skin.
Unlike humans, owls (and other birds) don’t sweat. Instead, they use a process called evaporative cooling. You might see them open their beaks and breathe quickly when it’s hot—kind of like how a dog pants. This helps moisture in their mouth and throat evaporate, which cools them down.
Some owls also do something called gular fluttering, where they rapidly move the muscles in their throat to release heat. It’s a clever trick that helps them stay cool without using too much energy.
2.Choosing the Right Roost
During the daytime, owls like to rest in shady, cool places. These can include thick trees, the upper corners of barns, or even rock crevices and ledges. These spots offer protection from direct sunlight and keep the temperature lower than the open air.
By picking well-ventilated roosts, owls avoid places that trap heat. Some even choose areas where a gentle breeze can pass through. Then at night, when they come out to hunt, they prefer to stay in higher places—up in the trees or gliding through open skies—where the air is cooler than it is near the ground.
3.Nighttime Advantage
One of the biggest advantages owls have is that they are nocturnal, meaning they are most active at night. This helps them avoid the hottest parts of the day. By hunting after sunset, owls move around when temperatures have already started to drop. It’s much easier for them to regulate their body heat during the cooler nighttime hours.
Being active at night also means they don’t need to use as much energy to stay cool. Their bodies don’t heat up as quickly, so they can glide and hunt without overheating.
4.Staying Hydrated (Without Drinking)
You might be surprised to learn that most owls rarely drink water directly. Instead, they get almost all the water they need from their food. When an owl eats a mouse, a frog, or an insect, it also absorbs the water stored inside that animal’s body.
This clever way of staying hydrated helps owls survive in areas where open water isn’t easy to find, especially in the summer when ponds or creeks may dry up.
5.Silent Flight Helps, Too
Owls are known for their silent flight, which helps them sneak up on prey. But did you know that flying quietly also helps them stay cool? Because their wings are built for smooth, gliding flight, they don’t have to flap as much. This means they use less muscle energy—and less energy means less heat.
Flying this way also lets them move long distances without getting too warm, making it easier to find food during hot summer nights.
How Can We Help?
Absolutely, people can and should help owls (and other wildlife) stay cool and safe during hot summer weather. Here are some simple, meaningful ways anyone can contribute, whether you live in the city, suburbs, or countryside:
1.Install or Maintain Nest Boxes Thoughtfully
- Use wooden boxes with insulation or ventilation holes to prevent overheating.
- Install nest boxes in shady areas, ideally facing north or east to avoid harsh afternoon sun.
- Avoid placing nest boxes on metal poles without insulation. They can heat up dangerously fast.
- Check regularly for signs of heat stress or insect infestation.
2.Preserve Trees and Shaded Areas
Old trees, especially those with cavities, are critical for natural owl roosts.
- Avoid cutting down dead or hollow trees. Just leave them. They might be home to owls or other small animals.
- Plant native trees and shrubs to cool the area and offer safe perching or hunting spots.
3.Avoid Poisoning the Food Chain
Rodenticides (rat poison) don’t just kill mice. They build up in owls that eat poisoned prey, especially in summer when food needs are high.
- Use humane traps instead of poison.
- Talk to neighbors about switching to owl-safe rodent control.
- Support campaigns against second-generation anticoagulant poisons.
