Mitigating the effects of electrocution on eagle owls in Western Slovenia

Challenge

Electrocution from medium-voltage power lines is a serious threat to the Eurasian Eagle Owl, which often uses power poles as hunting perches. Due to their large size, they easily cause short circuits, resulting in many electrocutions far from nesting sites. This project aims to reduce this threat in key hunting areas outside of protected areas such as Natura 2000.

Objective

Through this project, key hunting areas and critical 'black spots' in which the risk of electrocution is highest were identified. By insulating 23 poles, the project reduced the risk of electrocution at three black spots, resulting in the establishment of three new safe nesting sites, as confirmed by this year's volunteer-assisted monitoring. Chicks were observed in all three areas in June 2024.

Approach

The project collected a large dataset (1,754 records) on the occurrence of the Eurasian Eagle Owl. Using telemetry data and precise nest locations in relation to power line pylons, a model was developed to predict the use of power lines. This allowed the identification of nests near the most vulnerable pylons, particularly those in open hunting areas. In these areas, we insulated dangerous pylons and carried out extensive monitoring with the help of volunteers.

Achieved Results

After the project, three traditional Eurasian Eagle Owl nesting sites are much safer than before the project. This sets the stage for the long-term conservation of this species at key traditional nesting sites. Ongoing monitoring with the help of volunteers will allow us to track the sustainability of these results over time. An important outcome of the project has been the increased awareness of the public and electricity companies about electrocution and the need for such conservation measures.