Sexing Pics.

[gregmonsta]

Red-sided garter snake, Thamnophis sirtalis parietalis, 1.5 years old, approx 24 inches.

[gregmonsta]

It's a male lol forgot that part

Red-sided garter snake, Thamnophis sirtalis parietalis, 1.5 years old, approx 24 inches.

[guidofatherof5]

I put these diagrams together to help with the identifications.

[ConcinnusMan]

T. ordinoides. FEMALE 13 inches. Notice her thickness changes immediately after the vent. Tail is short. Indicates female. With ordinoides, females tend to have thick bodies (even when not gravid) while males are slim. Females also get much larger than males. Older adults near max size are easy to sex on first sight.



Another T. sirtalis concinnus. MALE 26 inches. Vent at red arrow. Notice the thickness of the snake doesn't immediately change after the vent and his tail is very long. Indicates male. Females vent to tail tip distance is much shorter for a snake of the same size. Females tend to have broader heads than males. In the wild, the very large concinnus (38-42 inches) have always been female in my experience.

[ConcinnusMan]

T.s. concinnus Female:

[gregmonsta]

Plains garter, Thamnophis radix, female, 2 years old.