Cute little fella, soon as he spotted me he lifted up and stayed like that, motionless, looking at me as if I were rather sus!
Garter snake. Probably a common ribbon snake but it could also be a Northwestern garter or one of several similar garters.
- https://en.wikipedia.org/wiki/Thamnophis_saurita (eastern ribbon) versus
- https://en.wikipedia.org/wiki/Thamnophis_ordinoides (northwestern garter)