The snake is in a bush or a hole and you can’t see its color or patterns. Good Guy or Bad Guy? Look at the pupil of the eye. Around here if it is Round it is non-venomous. Its the vertical-slit that is to be treated with caution. The same pupil as your cat. Below is a posing bull snake.
A Hog-Nosed snake.
A Garter Snake.
Yellow-Bellied Racer eating a Garter Snake.
The slit. The Vertical-slit. The Cat’s Eye. The Bad Guy.