1. Swiss Ornithological Inst Switzerland
2. Swiss Birdradar Solutions, Switzerland, and Polytechnic Univ. of Catalonia Laboratory of Applied Bioacoustics Spain
3. 2Centre for Ecology and Conservation, and Environment and Sustainability Inst., Univ. of Exeter Penryn, Cornwall UK
4. College of Plant Protection, Nanjing Agricultural Univ., Nanjing China
5. Research Agency in Applied Ecology France