Common Garter Snake

Fascinating facts about the Common Garter Snake

• A newborn garter snake is born alive—not from an egg—and mother snakes can produce up to 85 fully formed babies in a single birth. This live birth strategy, called viviparity, lets mothers control when and where their young enter the world, timing births for peak food availability. Most snakes lay eggs and abandon them; garter snakes invested in their offspring 100 million years ago and never looked back.
• Garter snakes hunt by taste, flicking their forked tongue to collect scent particles from the air and ground, then pressing the tips into two tiny openings (called the vomeronasal ducts) in the roof of their mouth. This dual sensory system lets them track a single earthworm's slime trail through soil in complete darkness. Their tongue isn't a weapon—it's a 3D scent map.
• In winter, hundreds or even thousands of garter snakes pile into the same den, a hibernation strategy called overwintering. They squeeze into rock crevices or abandoned rodent burrows, their bodies touching to share heat and survive temperatures that would kill them alone. Come spring, they emerge in tangled masses, males swarming females in a writhing ball to compete for mating—nature's strangest traffic jam.
• Unlike most snakes, garter snakes are generalist hunters that will eat almost anything smaller than their head: earthworms, slugs, insects, small fish, tadpoles, even other snakes. This flexibility means they thrive in wetlands, prairies, forests, and even suburban gardens—they're one of the few snakes that prosper when humans reshape the landscape. Adaptability, not specialization, is their superpower.
• Garter snakes produce a musky-smelling spray from glands at the base of their tail when threatened, a chemical defence that tastes foul to predators. But here's the twist: some garter snakes have evolved resistance to tetrodotoxin, one of nature's deadliest poisons, letting them safely eat rough-skinned newts that would kill almost any other animal. An evolutionary arms race between predator and prey, written in a single species.

At a glance

About the Common Garter Snake

As the common garter snake slithers through the damp underbrush, its sleek, mottled form seems to blend seamlessly into the shadows, a testament to its remarkable adaptability in a world of predators and prey. With sinuous, almost fluid movements, it navigates the intricate network of grasses and wildflowers, its forked tongue darting in and out to taste the air, ever vigilant for the slightest hint of danger or opportunity. In this quiet, unassuming way, the garter snake weaves its way through the landscape, a humble yet resilient presence that belies its fascinating complexity.

Discover more wildlife