About the Authors

Theresa M. A. Clarin

tclarin@orn.mpg.de

Affiliation Sensory Ecology Group, Max Planck Institute for Ornithology, Seewiesen, Germany

Ireneusz Ruczyński

Affiliations Sensory Ecology Group, Max Planck Institute for Ornithology, Seewiesen, Germany, Mammal Research Institute PAS, Białowieża, Poland

Rachel A. Page

Affiliation Smithonian Tropical Research Institute, Panama, Panama

Björn M. Siemers

† Deceased.

Affiliation Sensory Ecology Group, Max Planck Institute for Ornithology, Seewiesen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TMAC IR RAP BMS. Performed the experiments: TMAC. Analyzed the data: TMAC. Contributed reagents/materials/analysis tools: BMS. Wrote the paper: TMAC IR RAP BMS.