This column is provided as a public service by the Geophysical Institute, University of Alaska Fairbanks, in cooperation with the UAF research community. Ned Rozell is a science writer at the institute.
Fairbanks reader Darleen Masiak recently saw a red squirrel carrying an Amanita mushroom across her deck, presumably to stash it in its midden for the winter. She wanted to know how such a small mammal could survive after eating a mushroom that is toxic in large doses.
Fungus expert Gary Laursen of the University of Alaska Fairbanks confirmed that forest squirrels, both red and flying, cache Amanita mushrooms as well as other “psychoactive” mushrooms that affect the central nervous system.
He has dug into squirrel middens in the boreal forest and has found many samples of the mushrooms. He said a biologist recently contacted him and told he’d seen grouse digging up and eating mushrooms that would be toxic in large doses to humans.
“Many animals are known to go after the psychoactive ’shrooms,” Laursen said.