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Home / Bats in Nottinghamshire / Daubenton’s Bat

Myotis daubentonii
Head – Body 40-50mm. Wingspan 230-270mm. Weight 6-12gms.

Often called the water bat because of its habit of hunting low over ponds, lakes and rivers. They catch insects which are close to, or on, the water’s surface with their large feet or by scooping up prey with their tail membrane. In the summer they use a variety of places for their nursery roosts including holes in trees, buildings and bridges. In Nottinghamshire only four nursery roosts have been discovered (one in a tree, two in buildings and one in a rock crevice) although the bat itself has been recorded throughout the county. Winter roosts are generally in underground sites, old mines, tunnels, ice houses or caves for example.

Echolocation Calls
Daubenton’s bats produce the characteristically short calls produced by all the Myotis bats. On a heterodyne detector they sound like a rapid series of dry clicks. They produce a fast series of calls which speeds up when the bat turns. Recordings of calls made by time expansion often shows the calls to be bent rather than the straight calls produced by other Myotis bats.

Time expansion (10x) recording of a Daubenton’s bat.

Heterodyne (set at 45kHz) recording of a Daubenton’s bat.

daubenton's bat time expansion call