Southeastern Myotis

Fascinating facts about the Southeastern Myotis

• A southeastern myotis weighs less than a penny — roughly 3 to 5 grams — yet catches and eats up to 600 mosquitoes in a single night. That's 10% of its body weight in insects, equivalent to a human eating 16 full chickens before sunrise. It hunts by echolocation, firing 200 clicks per second to map the air and nail prey mid-flight in total darkness.
• Unlike most bat species that roost alone or in small clusters, southeastern myotis colonies erupt to 200,000+ bats crammed into a single swamp cave — a writhing, living ceiling of wings and fur. Mothers find their own pup among thousands using a unique voice signature and scent, calling out underwater-style echolocation clicks until their infant responds.
• Southeastern myotis females are the only North American bats to give birth twice in one year — once in spring, again in late summer — a reproductive strategy that mirrors their swamp habitat's feast-famine cycles. A single mother raises pups alone, hunting every night while her young cling to the roost, burning muscle mass to fuel milk production through the humid southern heat.
• Their ears rotate independently, swiveling 270 degrees like satellite dishes to triangulate a mosquito's flight path in three dimensions. This dual-ear sonar system lets them track a moving insect smaller than a sesame seed at speeds up to 40 kilometres per hour, adjusting their flight path in milliseconds without ever seeing their prey.
• Southeastern myotis depend entirely on flooded freshwater swamps — cypress domes and tupelo forests — that are vanishing at 1% annually across the Southeast. Their extinction in Florida's Orlando region occurred in just decades as drainage ditches drained their maternity roosts. Every swamp saved now is a direct lifeline for a bat that cannot pivot to new habitat like generalist species can.

At a glance

About the Southeastern Myotis

In the warm, humid nights of the southeastern United States, the Southeastern Myotis takes to the skies, its delicate wings beating in a hypnotic rhythm as it pursues the insects that dance in the moonlight. With echolocation calls that pierce the darkness, this small but formidable bat navigates the labyrinthine waterways and forests, its agility and precision allowing it to exploit a realm that is hidden from most other creatures. As it flits and weaves through the shadows, its very existence is a testament to the magic and mystery that still lurks in the unlit corners of our world.

Discover more wildlife