Many people know that the northern spotted owl stopped the cutting of old-growth forests, but few people know why. In the late 1980s, the Fish & Wildlife Service listed the spotted owl as a threatened species because it relies on old-growth forests, which were rapidly being cut, as its habitat. This contributed to a huge decline in timber harvests from federal lands after 1990.
Fish & Wildlife Service photo.
The spotted owl is a predator whose main prey are northern flying squirrels, red-backed voles, and other species that mainly live in old-growth forests. But the spotted owl is not the stop of the food chain: it is preyed upon by the great grey owl, which especially goes after undefended juveniles and eggs. When given the opportunity, the great grey will swoop down on spotted owl nests, knocking the eggs or young out of the nests, and then feeds on them on the forest floor.
