28 December 2022
After five days of extremely cold weather the temperature is rising into the 40s today and will stay above freezing in the week ahead. Hard fruits that were softened by the freeze are now poised to ferment in warmer weather. Soon we may see drunken birds.
Birds leave crabapples and Callery pears on the trees in November because they’re too hard to eat. Freezing breaks down the starches into sugars and when the fruit thaws it is soft and yummy. However yeast gets into the fruit and ferments it. Birds gobble up the soft tasty fruit. If they eat too much they get drunk.
When abundant rowan berries fermented in Gilbert, Minnesota in October 2018, waxwings gorged on them and became quite drunk.
This black-billed magpie didn’t care that he was eating fermented apples until he could barely walk. He staggers among the apples and is only slightly more agile by the end of the video.
Pumpkins are a fruit and, yes, they can ferment. When they do, squirrels get drunk.
In 2015 a study reported that fermented fruit is becoming more common because of climate change. There’s more news in this vintage article.
(photos by Kate St. John and from Wikimedia Commons; click on the captions to see the originals)