Snakes

Common Gartersnake (Formerly Common Garter Snake)

Common Gartersnake (Formerly Common Garter Snake)

Scientific Name: Thamnophis sirtalis

Family: Natricidae

Nonvenomous

 

Description & Size

  • Legless
  • No eyelids
  • Lacks external ears
  • Scales on the back have a ridge in the middle (keeled)
  • Single anal scale
  • Stripe on each side of the snake that runs head to tail on the 2nd and 3rd scale rows above the belly scales (ventral scales)
  • Total length:  41.0-140.0 cm (16.1-55.1 in)
  • Back color:  dark
  • Belly color:  white to yellow (usually)

Habitat

  • Almost any habitat next to water
  • Most common: grassland-woodland edges by water

Diet

  • Fish
  • Amphibian adults and larvae
  • Worms
  • Small mammals
  • Insects
  • Slugs

Life History

  • Diurnal
  • Active season:  March – December
  • Breeding season:  late March - June
  • Give live birth
  • 3-85 young per individual

Range

Common Gartersnake (Formerly Common Garter Snake) Range