Common Noctule (Nyctalus noctula) lives in temperate forests across Europe and Asia. It feeds on insects and beetles. Its conservation status is Least Concern.
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A real field recording of the Common Noctule, made in the wild.
Zooming through twilight, the common noctule darts at 20-40 km/h (12-25 mph) and can burst up to 60 km/h (37 mph). It launches before most European bats, soaring high above forests and still reaches speeds of up to 50 km/h (31 mph) while hunting. This rapid, high-altitude flight lets it chase beetles, moths and winged ants across open spaces, turning the night sky into a moving insect-control net that keeps forest pests in check.
Female noctules pack their bags each autumn, traveling north-northeast up to 750 km to summer roosts, while males stay put, creating a striking female-biased migration. Some individuals even trek hundreds of kilometres between summer and winter sites, and the longest recorded nonstop journey stretches an astonishing 2,347 km.
A single female gives birth to one or two pups, each weighing about a third of her own 25-30 g body weight. After just three to four weeks of exclusive milk feeding, the newborn leaves the roost almost fully grown, having reached adult size without ever leaving the safety of the maternity colony. Gestation lasts 50-70 days, and the species can live up to eight years in the wild.
When winter bites, noctules huddle in massive hibernation colonies that can swell to 1,000 individuals. They abandon chilly tree holes for warmer caves, church steeples or even flat-top apartment blocks, especially in Eastern Europe. Pregnant females also form daytime roosts of up to 400 bats in trees or buildings, staying together until their young are weaned.
The noctule's sonar toolkit includes two distinct call types. The first sweeps between 26-47 kHz, peaking at 27 kHz with an average pulse lasting 11.5 ms, while the second ranges from 22-33 kHz, strongest at 22 kHz and lasting about 13.8 ms. These precise frequencies let the bat pinpoint beetles and moths high above the canopy, turning darkness into a detailed acoustic map that guides its high-speed hunting flights.
Sources
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As the sun dips below the horizon, the common noctule takes to the evening skies, its leathery wings beating in a slow, deliberate rhythm as it navigates the twilight world with ease. With echolocation calls piercing the darkness, this agile hunter darts and weaves through the trees, its large eyes drinking in the faint moonlight as it pursues the insects that dance in the fading glow. In its nocturnal realm, the common noctule reigns supreme, a master of the shadows and a testament to the wonders of adaptation.
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