Two U.S. Fish and Wildlife Service Species of Concern are found on North Fork Mountain, the peregrine falcon and the Allegheny woodrat. Golden eagles are also known there. Various locally abundant but globally rare species of bats that roost in nearby limestone caverns are also often seen foraging over North Fork Mountain's western slopes. The pink-edged sulphur butterfly is known from Panther Knob, Its caterpillars feed on the blueberries that thrive atop this knob after fires.