Elaphe obsoleta obsoleta
Status: Not Listed
Black rat snakes are large non-venomous snakes between 3.5 and 7 feet (one and two meters) long. They have shiny black scales on their back and a light colored belly, and their throat and chin are white. The head of a black rat snake is wider than the neck and the rest of the body.
Black rat snakes live in fields, woodlands, farmlands, and around suburban communities from Connecticut to South Carolina and west to the middle of Kansas and Oklahoma. Predators include hawks and other snakes.
Black rat snakes are excellent swimmers and climbers. They will use these skills to catch a variety of food, from bird eggs to frogs. They are the snake most likely to be seen around buildings hunting for rodents, amphibians, and young birds. Black rat snakes are constrictor snakes and will use their body to suffocate their prey.
Rat snakes emit a foul-smelling odor when they feel threatened by a predator. This musk imitates what a poison would taste like.
The typical breeding season for this snake is from May to late June. During this time, male snakes search for females and will fight one another for the right to mate with a female. A female will lay between six and two dozen eggs, usually in late July. The eggs may take between five and seven weeks to develop and hatch. Hatchlings will stay near their hatching site for up to two years.
The black rat snake’s population is considered stable. However, these snakes are often mistreated by humans who are frightened of them. Although black rat snakes do not usually attack when threatened, there have been extreme cases of black rat snakes charging at predators. Despite making occasional appearances throughout the summer, black rat snakes are actually very shy and at the sight of danger will either freeze or slither away. Black rat snakes also produce a strong foul odor when scared to deter predators and humans.
Black rat snakes brumate in colder months. Brumation is similar to hibernation - it allows the snake to be mostly asleep, but still wake up for occasional activities, such as drinking water.
Animal Diversity Web, University of Michigan Museum of Zoology
Michigan Department of Natural Resources
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