Adult male gorillas in the wild ‘sing’ and ‘hum’ more during feeding than their younger or female counterparts, according to a study published today in the open-access journal PLOS ONE by Eva Maria Luef and Simone Pika at the Humboldt Research Group at the Max Planck Institute for Ornithology, Germany, and their colleague Thomas Breuer from the Wildlife Conservation Society in New York.  To access the study, click here: http://journals.plos.org/plos...

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