New Fear Unlocked: There Are Venomous SHREWS in Michigan

You may want to stop reading if you are already freaked out by small, furry creatures who lurk in holes in your Michigan yard. Still here? Chances are you've encountered this animal more than once, and other than the shock of seeing a tiny mammal up close, you never gave it a second thought. That's the beauty of Michigan's venomous mammal, the northern short-tailed shrew.

Related: The Deadly 7: Michigan's Most Venomous and Poisonous Threats

The northern short-tailed shrew is pretty common in Michigan and surrounding states. They range from 3 to 4 inches in length, weigh under an ounce, and have gray fur that has been described as soft and velvety. If this sounds cute to you, like something you'd like to pick up and pet, think again. Remember, these are venomous shrews, and the effects of it are no joke to Michigan wildlife, pets, and residents.

Michigan's Northern Short-tailed Shrew's Venom Makes It a 'Live Hoarder'

The shrew's bottom incisors have evolved a groove where the venom is passed to its prey through a bite. The venom paralyzes the prey so that the shrew can eat it later and continue hunting. It's a favorite meal; fittingly, the mealworm can be paralyzed by the northern short-tailed shrew's venom for up to 15 days, reportedly staying fresh, immobile, and 'crunchy.' This practice is referred to as 'live hoarding,' and it's terrifying, even if they are just mealworms.

It's said that Michigan's northern short-tailed shrew, the most common shrew in the state, carries enough venom in its body to paralyze 200 mice. Venomous mammals are rare and are still being studied, including the effects and potential uses for Michigan's northern short-tailed shrew's liquid defense.

As for the venom's effects on more giant creatures, like pets, it's unpleasant. Though rarely deadly, it can make your pet very sick, especially for cats who may mistakenly try to bring the shrew into your home as a gift...aren't cats great?

Related: Michigan DNR Invasive Species Watchlist: Northern Snakehead

Humans who the northern short-tailed shrew bites can expect some sharp pain, burning, and itching around the wound but other than that, nothing serious. The easiest way not to be bitten by a shrew is not to pick it up. If you do spot one, give it some room...and maybe a few mealworms.