coast garter snake coiled in defense posture

alert america animal animals aquatic area bay california camera carnivorous cautious close closeup coiled county danger defense defensive elegans francisco garden gardener garter gartersnake harmless head heterothermic looking macro manitoba marin narcisse nature nerodia nonpoisonous north parietalis pheromonal posture reptile san serpent snake snakes striped stripes terrestris thamnophis the toxic venomous viper water wild wildlife yellow