Swift foxes have become endangered for many reasons. they lost their habitat when prairie farmers planted crops where the swift fox used to live. Swift foxes can’t run through the farmers’ tall crops and grasses to catch or stalk prey. swift foxes were accidentally shot, trapped, and poisoned in programs that were trying to kill coyotes, ground squirrels, and wolves. The swift foxes were so curious that they often got in the trap or ate the poison that was meant for another animal. dry summers and cold winters with lots of crusted snow cut down the number of prey that the swift foxes can hunt, and they starve when they do not have enough animals to eat.