Scientific Name Common Name Global Rank State Rank Federal Status WI Status Animal Group

Slender Glass Lizard (Ophisaurus attenuatus)








Photo by Rori Paloski


Counties with Mapped NHI Occurrences

Slender Glass Lizard (Ophisaurus attenuatus), listed as Endangered in Wisconsin, prefers sandy oak savannas, sand prairies, old fields with sandy soils, and woodland edges around and within all of these habitats. Glass lizards overwinter in burrows they create by forcing their bodies through lose sandy soils. This lizard is active from mid-March through mid-October. Breeding occurs in May, eggs are deposited from late-June to early-July and hatch in August. See the species guidance document for avoidance measures and management guidance from the Natural Heritage Conservation Program.


Species of Greatest Conservation Need (SGCN) are associated with habitats (or natural communities) and places on the landscape. Understanding relationships among SGCN, natural communities and ecological landscapes help us make decisions about issues affecting SGCN and their habitat and how to respond. Download the Wildlife Action Plan association score spreadsheet to explore rare species, natural communities and ecological landscape associations

Conservation actions respond to issues or threats, which adversely affect species of greatest conservation need (SGCN) or their habitats. Besides actions such as restoring wetlands or planting resilient tree species in northern communities, research, surveys and monitoring are also among conservation actions described in the Wisconsin Wildlife Action Plan because lack of information can threaten our ability to successfully preserve and care for natural resources.