1. Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI); CNRS, University Paul Sabatier – Toulouse III , Toulouse, France
2. School of Biological and Behavioural Sciences, Queen Mary University of London , London, UK
3. Department of General Psychology, University of Padova , Padova, Italy
4. Department of Biology, George Mason University , Fairfax, VA, USA
5. School of Life Sciences, University of Sussex , Brighton BN1 9RH, UK