Most primates only make vowel-like calls, so where did consonants come from? A new idea suggests living in trees may be linked to broad vocal repertoires in great apes
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Our complex speech may have originated from life in the trees. The first analysis of the evolution of consonants suggests their roots may be linked to an arboreal lifestyle, hinting that our ancestors spent more time in trees than currently thought.uses a combination of vowels and consonants to transfer information. Most primates communicate almost exclusively using vowel-like calls, but non-human great apes produce consonant-like sounds to varying degrees.at the University of Warwick in the UK.
“Orangutans have this rich repertoire of kiss sounds, scrapes and clicks and raspberries and smacks,” says Lameira. They typically use these sounds while building nests, or communicating with their young, or as alarm calls. Lameira thinks that living in the trees may explain why orangutans have evolved this broad vocal repertoire. Great apes are adept at extracting hidden or protected foods, like nuts, a skill that often requires the use of tools. While foraging up in the canopy, however, orangutans must always use at least one arm to maintain stability.
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