Many terrestrial migratory birds fly over coastal and marine areas during their migration. Offshore wind farms (OWF) could have an impact on birds by causing collisions leading to mortality. Collision Risk Models (CRMs) are widely used in the marine environment for seabirds as part of environmental impact assessments for offshore wind projects. Their use for terrestrial migratory birds is questioned due to the greater uncertainty in the data used to describe their flight parameters at sea (e.g. flight altitude or bird density).

The AVOCET project aims to improve the robustness of these models by integrating innovative flight data on terrestrial migratory birds , acquired from the European weather radar network.
Key questions include:

• Where and when do terrestrial migratory birds cross at sea, and how many cross OWF sites?
• Can the use of weather radars to describe bird flows improve the estimation of collision risks in offshore environments?