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

- Type D social calls of the Common Noctule
- Type D social calls of the Common Pipistrelle
- Type D (part D) social calls of the Nathusius' Pipistrelle
- Type D (part E) social calls of the Nathusius' Pipistrelle
- Type D (trills, wavy-line and other unusual) social calls of the Nathusius' Pipistrelle

Common noctule:

Nathusius' pipistrelle:

Common pipistrelle: