Strangles its prey before eating it. Mainly feeds on rodents and birds (young and eggs), but on occasion also feeds on amphibians as well as other snakes. It eats every 7 to 10 days.
In nature, from 8 to 10 years. Up to 20 years in captivity.
Great Lakes and St-Laurence population, threatened and Carolinian population, endangered
Mating occurs in the spring and early summer, at approximately 4 years of age. Five weeks later, the female lays between 12 and 20 eggs. Hatching occurs 65 to 70 days later. If conditions are good, the female may produce two clutches per year.
The raccoon and skunk prey on its eggs while birds of prey target the young.