Simone Pika
Humboldt Research Group
'Comparative Gestural Signalling'
Max Planck Institute for Ornithology
Eberhard-Gwinner-Straße
82319 Seewiesen
Germany
Phone: +49 (0)8157 932 237
Acknowledgements: Lilian Bartens, Richard W. Byrne, Dorothee Classen.
