Follow-up measures

Monitoring bats during the operational phase

Objectives and methodology

In the operational phase, 8 wind turbines will be equipped with acoustic recording stations (ultrasound) in order to evaluate and characterize the activity of migrating bats in the park area.

This monitoring aims, among other things, to provide information on the presence of the Nathusius Pipistrelle migrating in the offshore wind farm. The latter having been detected at the Grand Léjon lighthouse but never in the park area.

This monitoring will also provide information on whether the wind farm in operation constitutes a source of light attraction for bats.

To do this, 8 wind turbines will be equipped with acoustic recording stations (ultrasound). These stations are distributed around the outskirts of the wind farm (see Figure below).

Location of actions

Eight acoustic recording stations will be distributed among the peripheral wind turbines within the park. Positions 50, 61, 47, 38, 12, 3, 4 and 25 are currently preferred (see figure below).


Schedule and Status


Measure under development

This monitoring will constitute a continuation of the bat monitoring during the construction phase. It will also take place during bat migration periods, in spring and fall. It will begin when the wind turbines in the park are commissioned and for a period of 3 years during the operating phase of the park, i.e. in 2024, 2025 and 2026.

    All follow-up measures

    Reduction measures

    Compensation measures

    Accompanying measures