"While other animals have been shown to use song to attract mates or signal danger, researchers writing in this month's science journal PLoS One said their study was the first to show gibbons - a slender, tree-dwelling ape - issuing song-like warnings to each other.
"This work is a really good indicator that non-human primates are able to use combinations of calls ... to relay new and, in this case, potentially lifesaving information to one another," said Esther Clarke, a University of St. Andrews graduate student and co-author of the study."
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