The Western Hemisphere is not only the origin of corn, potatoes, and tomatoes, but also squash and pumpkins. Carrots, probably purple at first, were from Afghanistan. Beans are thought to have been found in both the Western Hemisphere and the Mid-East. Onions have been cultivated in Asia for thousands of years.
The ring neck snake is mildly venomous, but don't worry, it uses the venom to kill frogs, worms, pill bugs, and lizards. The venom though is to mild and delivered in too low a dose to harm a human. Ringneck snakes secrete a foul smelling odor when frightened.
If in doubt, just leave the snake alone. But no, garter snakes are not poisonous. Garter Snake Appearance: Garter snakes are small bodied serpents living in North America. They are not dangerous to people, and most have a striped pattern, often over a green or brown body, though colors can vary.