Three species of African birds are slurping alcoholic palm wine from trees that have been tapped by local people. The behaviour may be socially learned and therefore evidence that the birds have their own unique cultures.
The birds all live on islands in the Bijagós archipelago, off the coast of Guinea-Bissau in West Africa.
There, as in other parts of Africa, one of the the most popular alcoholic drinks is palm wine, which is the partially fermented sap of oil palm trees ( …
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