To listen to type C social calls, you can visit the files of the following lists on Xeno Canto:

- Type C.d (high frequency FM) social calls of multiple (flying) species of bats
- Type C.d (high frequency FM) social calls of multiple (stationary) species of bats
- Type C.d (male advertisement) social calls of Nyctalus spp.
- Type C.i (low frequency qCF) social calls recorded in the vicinity of maternity roosts
- Type C social calls of the Common Pipistrelle
- Type C social calls of the Common Noctule
- Type C social calls of multiple species of bats

High frequency FM calls

All following calls are emitted while in flight.

Low frequency warbled qCF calls

All the following calls are emitted from within a maternity roost.

Common pipistrelle:

Serotine bat:

Pond bat:

Disrupted calls

All following calls are from roosting bats that were disrupted by the use of a flashlight.

Common pipistrelle:

Daubenton's bat:

All recordings are licensed under the following Creative Commons Attribution-NonCommercial-NoDerivs 4.0 license and in courtesy of Sarah Mahie. 
All sonograms are screenshots of the recordings imported in the ultrasound analysis software BatExplorer 2.2 (Elekon, Switzerland).