Click on the following buttons to see all relevant recordings of that specific year:

Type A

Used aggressively while individual bats are in dispute with each other within the roost (Middleton et al., 2020).
Recorded underneath a roosting colony. Examples: 921156, 921145, 921146, 924494

Type B

Roosting sounds. Components often clustered in small groups, but can be in long sequences too. Examples: 921164, 921165, 920967, 920938, 924450, 924495

Type C

Almost 97% of the social calls of brown long-eared bats that were recorded during a research to social calls of brown long-eared bats conducted by Murphy (2012) fell into the type C category (Middleton et al., 2020). The type C social calls of this species look very similar to their regular echolocation calls, but are lower in frequency.

Examples: 912745, 920956, 920954, 921159, 921162, 921161, 924476, 924477

Type D

Type D1 is characterized with a hooked start similar to a walking cane. This call type is associated with mating behavior.
Type D2 contains an upward hook at the end. This call type may also occur in relation to mating activity.

Example of type D2: 935733

All images on this page are licensed under the following Creative Commons Attribution-NonCommercial-NoDerivs 4.0 license and in courtesy of Sarah Mahie. 

Bibliography:

- Neil Middleton, Andrew Froud and Keith French (2022). Social Calls of the Bats of Britain and Ireland. Second edition. Pelagic Publishing.

- S. E. Murphey (2012). Function of social calls in brown long-eared bats Plecotus auritus. PhD thesis, School of Life Sciences at the University of Sussex.