Thamnophis sirtalis infernalis born on May 6th 2017 Steven Bol Garter Snakes Posted on July 4, 2017 by AdministratorJanuary 30, 2019 3 different litter mates of Thamnophis sirtalis infernalis born on May 6th 2017, at the age of almost 2 month old.Feeding well and coloring up nicely.They are from a bloodline originating from Marin County, California, USA.