Recordings from 2024 & 2025

To listen to social calls of the Leisler's bat, you can visit the files of this list on Xeno Canto.

These type C.d1 male advertisement social calls were recorded in a residential area surrounded by a wooded area. The calls are suspected to be emitted while in flight. The Leisler's bat usually emits advertisement calls during a songflight up to 300 meters from the roost (Middleton et al., 2022). In comparison to the common noctule (Nyctalus noctula), the advertisement social calls are shorter in duration and with a descending FM effect.

The white arrows indicate the advertisement calls in the following snippits:

Date of recordings: 2024-09-16          Recorded by: Douwe van der Wijk          Audio files: 935427, 935408 

The following recording is made in a forrest and contains type D social calls. Common noctule (Nyctalus noctula) and Leisler's bat (Nyctalus leisleri) are presumed to be present, however the only reference material that shows a similar social call is a recording from a greater noctule bat (Nyctalus lasiopterus) - recorded by Alex Lefevre, figure 8.22.11 in the book "Bat calls of Britain and Europe" edited by Jon Russ. The latter species would be an extraordinary sighting for the Netherlands, so I am hesitant to identify it as such based on the social calls alone. Due to the present echolocation calls, I currently will name these as from the Leisler's bat.

Date of recordings: 2025-06-19          Recorded by: Sarah Mahie, Boaz van Die          Audio files: 1008061, 1008063