1. Structure and Motion Laboratory Royal Veterinary College University of London Hatfield UK
2. Department of Psychology Hunter College and the Graduate Center of the City University of New York New York NY USA
3. School of Earth and Environmental Sciences University of Adelaide Adelaide SA Australia
4. Department of Biology Norwegian University of Science and Technology Trondheim Norway
5. Department of Zoology and Laboratory of Ornithology Palacký University Olomouc Czech Republic