Anecdotes abound of wildlife behaving 'drunk' after eating fermented fruits, but despite this, nonhuman consumption of ethanol has been assumed to be rare and accidental. Ecologists now challenge this assumption. They argue that since ethanol is naturally present in nearly every ecosystem, it is likely consumed on a regular basis by most fruit- and nectar-eating animals.

https://www.sciencedaily.com/releases/2024/10/241030150809.htm

QuoteWild chimpanzees have been found to consume the equivalent of a bottle of lager's alcohol a day from eating ripened fruit, scientists say.

They say this is evidence humans may have got our taste for alcohol from common primate ancestors who relied on fermented fruit - a source of sugar and alcohol - for food.

https://www.bbc.com/news/articles/cgq4710vendo