The short fur on the upperside of the head and body is dark brown and that on the underside is pale, with the chin, throat and chest contrasting sharply with the animal's back.

[3] Savi's pipistrelle is native to the Mediterranean region of southern Europe, North West Africa, the Middle East, central Asia, Mongolia and northern Japan.

In winter it seeks more protected places to roost such as near the entrances of caves, in underground vaults and in deep rock crevices, where it normally hides alone.

[3] Savi's pipistrelle feeds on flying insects which it catches on the wing using echolocation to locate its prey.

It has been found that it synchronises the emittance of the ultrasonic sounds used for this purpose with its wing beats, in order to maximise detection distances.