Colorado voters will decide on Nov. 3 whether the state should reintroduce gray wolves (Canis lupus) after a nearly 80-year absence. By the 1940s, shooting, trapping and poisoning had systematically eradicated wolves from Colorado. In recent decades a few lone wolves migrated to Colorado from adjacent states, but were killed or simply disappeared. Then, starting in 2019, a pack of up to six wolves and a separate lone wolf were sighted in northern Colorado. Ultimately, then, if Coloradans want to bring wolves back, having wildlife biologists reintroduce them is the most likely route.