Nature’s hidden bars: How wild animals find natural intoxicants

How Animals Can Get High in the Wild · 12:09 · Video: SciShow · Watch at the source

In short: From spinning deer in France to birds with impaired reflexes, the animal kingdom is full of accidental partygoers. While humans often seek out substances, many wild animals encounter alcohol and hallucinogens through their natural diets, leading to behaviors that mirror human inebriation with surprising biological consequences.

The phenomenon of animal intoxication is well-documented across various species. In rural France, local authorities have warned drivers about deer exhibiting erratic behavior, such as spinning in circles and flopping over, likely caused by consuming fermented fruits. While these antics can also stem from injury or disease, the presence of natural intoxicants like fermented grapes or hallucinogenic mushrooms makes inebriation a plausible explanation for such unpredictable movements. The Gendarmerie de Saône-et-Loire issued a specific online warning regarding these incidents. These animals might also be reacting to neurological disorders. Other common natural sources include poppies and hallucinogenic plants.

One of the most notable examples involves the Cedar waxwing, a North American bird capable of eating only fruit for several months. When these birds gorge on overripe berries, naturally occurring yeast can convert sugars into ethanol and carbon dioxide. Because alcohol acts as a neurodepressant, these birds experience slower reflexes and impaired decision-making. This biological shift makes them significantly more vulnerable to predators, vehicles, and window strikes, as their nervous systems are effectively 'turned down.' These birds are known for their striking plumage and black eye masks. They are unique for their ability to survive on fruit alone. Interestingly, certain wasps can tolerate high alcohol levels without experiencing a hangover.

The question of intent remains a subject of scientific curiosity. While most animal intoxication is considered accidental, some researchers suspect that certain species, such as chimpanzees, may actively seek out substances that provide an alcoholic effect. A 2020 study led by Piotr Tryjanowski analyzed 55 species of birds—including parrots and corvids—that consume alcohol. These findings highlight a broad spectrum of behavior, from intelligent birds sipping human beverages to wild species navigating a world of naturally occurring 'buzzes.' The research included both wild animals and domestic pets. It specifically noted that many clips featured stereotypically intelligent species. Elephants and reindeer are also cited as examples of animals that experience these effects.

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