What kind of garter snake is the one with the blue belly?

The garter snake known for its distinctive blue belly is the Eastern garter snake (Thamnophis sirtalis sirtalis). This subspecies is commonly found in the eastern United States and parts of Canada. The blue coloration is most prominent in juvenile snakes and can vary in intensity among individuals. Eastern garter snakes are non-venomous and often exhibit a pattern of stripes along their bodies.