The Pen-tailed Treeshrew is one of seven known wild mammals that chronically consume alcohol.
The pen-tailed tree shrew feeds on nectar of an ever flowering plant, the bertam palm, which is also the primary food source for many other animals as well. Yeast cells in the palm’s flowers ferment its nectar, which can contain up to 3.8% alcohol. Comparing all living plants that produce alcohol this one is the one that has the highest concentrations of alcohol.
