Follow-up actions

Monitoring of chiropterans in the construction phase

Objectives and methodology

The methodology consists of equipping a ship and the Grand Léjon lighthouse with an acoustic system including an acoustic recorder, a microphone and a solar panel to power the system in order to evaluate and characterize chiropteran activity in the wind farm area and its surroundings. The objective is also to identify whether the site is a source of light attraction for chiropterans and in particular Nathusius' Pipistrelle.

The acoustic recorders that will be used will have the particularity of detecting ultrasound over a previously defined range of frequencies and recording them.

The parameters that will be searched will be :

  • Identification of the species present ;
  • The identification of their behaviour;
  • Counting of contacts made with bats.

A methodology similar to that used during the initial state will be implemented.

This will be done in partnership with Lighthouses and Beacons.

Location of actions


Planning and Status


Measure under development

Monitoring will take place during the bat migration periods, that is, in spring and fall in 2021, 2022, and 2023.

    All follow-up actions

    Reduction measures

    Compensation measures

    Accompanying measures