For every venomous species that grabs headlines and horror-movie cameos, there are dozens of snake species quietly going about their business without a single drop of dangerous venom to their name, roughly 85 percent of the world’s snakes fall into this harmless category. These non-venomous snakes still play a genuinely important ecological role, keeping rodent, insect, and pest populations in check across farms, gardens, and forests worldwide, even though most people can’t tell them apart from their venomous cousins at a glance. From backyard regulars to some of the largest snakes on the planet, here are seven of the most common non-venomous snakes found across different corners of the world.