Daubenton's Bat over the Lake Kallavesi. Vesisiippa ja ultraäänispektri Särkilahti, Kuopio, Finland .

The insert shows a sonogram of six ultrasonic echolocation calls of this species. Y-axis shows frequency (kHz) of call, x-axis shows time in seconds and colour spectrum shows amplitude (sound pressure). Recorded with Petterson ultrasonic detector M500-384 using Samsung Galaxy Tab 2 with Bat recorder app.