About the Authors
- Maris Hindrikson, Urmas Saarma
- Department of Zoology, Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
- Peep Männil
- Estonian Environment Information Centre, Tartu, Estonia
- Janis Ozolins
- State Forest Research Institute “Silava”, Salaspils, Latvia
- Andrzej Krzywinski
- Wildlife Park Kadzidlowo, Ruciane Nida, Poland
AK is an employee of Wildlife Park Kadzidlowo who played a role in the data collection and analysis of the manuscript. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.
Conceived and designed the experiments: MH PM JO AK US. Performed the experiments: MH AK. Analyzed the data: MH PM JO AK US. Contributed reagents/materials/analysis tools: MH PM JO AK US. Wrote the paper: MH US.