Massasauga
Sistrurus catenatus • Order: Squamata, Suborder: Serpentes, Family: Viperidae, Subfamily: Crotalinae, Genus: Sistrurus, Species: S. catenatus
North America, primarily distributed in parts of the United States and southern Ontario, Canada, inhabiting isolated pockets in the Midwest and Great Lakes regions.
Look up Massasauga in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Viperidae, Subfamily: Crotalinae, Genus: Sistrurus, Species: S. catenatus
Conservation
Listed as Least Concern globally by the IUCN, but many regional populations face significant threats from habitat fragmentation, wetland drainage, and human persecution.
Physical Description
Stout-bodied snake featuring a patterned background of gray or brownish-gray with distinct, dark brown or black rounded blotches down the back and smaller alternating spots along the sides. The head is distinctively wider than the neck, featuring vertical pupils and keeled scales across the body.
Size & Dimensions
Typically reaches an adult length of 60 to 75 cm (24 to 30 inches), with maximum recorded lengths approaching 100 cm.
Habitat
Wetlands, swamps, marshes, floodplains, and adjacent dry or wooded uplands, ranging from sea level to moderate elevations.
Diet & Feeding
Feeds primarily on small mammals such as mice and voles, as well as amphibians and occasionally other reptiles, utilizing an ambush foraging strategy.
Reproduction
Ovoviviparous, giving birth to live young. Females typically produce litters ranging from 5 to 20 offspring during late summer or early autumn, breeding every other year on average.
Conservation Status
Listed as Least Concern globally by the IUCN, but many regional populations face significant threats from habitat fragmentation, wetland drainage, and human persecution.
Cultural Significance
Plays an important ecological role in controlling rodent populations within its wetland and upland habitats, while also being the subject of intense conservation education and regional protection programs.
Notable Features
Equipped with a rattle at the tip of the tail, heat-sensing pit organs located between the eye and nostril, and a notably stout body proportion relative to its length.