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This is Scientific Americans' 60 Second Science.

I'm Sarah Chodash.

This is a story about the birds and the bees.

When the Jawa people of Mozambique want to find beehives full of honey, they make this noise.

That sound attracts the attention of what are appropriately called honey guide birds. If you ask a jawa honey hunter why they go brr-hm when they're looking for a honey guide,

they'll tell you, well, it's the best way to attract a honey guide and to maintain its attention while you're following it to a bee's nest.

Claire Spadiswood of the University of Cambridge in England and the University of Cape Town in South Africa.

The jawa have long known that they could attract honey guides vocally, as part of a rare example of a mutualistic relationship between people and wild animals. The humans get honey,

and the birds then get what they want, the previously unattainable wax of the beehive,

which they consider a delicacy.

Spontes-Wood study provides evidence that the humans are actually communicating with the birds.

We wanted to specifically test whether Honeyguides responded to the exact information content

of the Brinacall, which signals, if you wish, I'm looking for bees nests. So we wanted to distinguish that

from the alternative. The cult simply alerts honeyguides to the presence of humans. Which the

research team did. Birds were much more likely to respond to... than to other sounds. The

studies in the journal Science. Honeyguides may help people, but to other birds, they can be monsters.

Honey guides are the real jekyll and the hide of the bird world.

...