Mammals of North America

North America hides a wilder cast of characters than most people realize. From the frozen edges of the Arctic to the sun-baked deserts of the Southwest, the continent supports a staggering range of mammals — some familiar, many almost never seen.

Consider the scale of it. North America is home to somewhere north of 400 mammal species, and they range from creatures that weigh less than a coin to giants that shake the ground when they move. Diversity like that is easy to overlook when the same handful of animals show up on every calendar and cereal box.

Here's something worth chewing on. The tiny shrew has a metabolism so ferocious it must eat almost constantly to survive; go a few hours without food and it starves. Meanwhile, some bats native to the continent can live past thirty years, an absurd lifespan for an animal that small.

Then there's the matter of speed, camouflage, and sheer stubbornness. Certain weasels turn snow-white in winter and chestnut-brown in summer, swapping wardrobes twice a year. Beavers reshape entire landscapes, building dams so large they can be spotted from space. And the humble opossum, North America's only marsupial, carries a natural resistance to snake venom that scientists are still studying.

Some of these animals are masters of disappearing. Wolverines roam territories that span hundreds of square miles, and a person could spend a lifetime in the backcountry without ever glimpsing one. Mountain lions slip past hikers who never know they were watched. The continent is full of ghosts with fur.

So how many of these animals can be recognized on sight? A moose is easy. But a marten and a fisher? A pronghorn and a mule deer? The differences get subtle fast, and a quick glance often isn't enough. Field guides exist for a reason.

This quiz spans the whole spectrum — the icons, the oddballs, and the elusive specialists that most people never encounter. Some questions lean on photos. Others test the kind of facts that separate casual nature fans from genuine enthusiasts.

Ready to find out how sharp those instincts really are? Scroll down, start the quiz, and see how many of North America's mammals can be named.