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Honey hunters ask birds for help: honeyguides, Yao people communicate to collaborate.
When asked the right way, a savvy bird species steers African hunter-gatherers to honey. All it takes is a loud trill followed by a grunt that sounds like "brrr-hm."
Birds known as greater honeyguides (Indicator indicator) lead hunter-gatherers in Mozambique to honeyrich bees' nests after hearing humans make this signature call, say evolutionary ecologist Claire Spottiswoode of the University of Cambridge and colleagues. In exchange, the birds get human-aided access to...
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