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Home Acetic acid

The Vinegaroon Sprays Acid to Foil Its Foes

Planetic Net by Planetic Net
June 11, 2022
in Acetic acid, Acid, Anger, Ant, Arachnid, Art, BASIC, Burrow, Exoskeleton, Forceps, Law, Nature, Pepper spray, Raccoon, Rat, Research, Salad dressing, Scorpion, Skeleton, Skunk, Sun, Time, Uncategorized, Vinegar
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DEEP The Vinegaroon Sprays Acid to Foil Its Foes KQED x

DEEP The Vinegaroon Sprays Acid to Foil Its Foes KQED x

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A long, skinny tail like a … RAT?

This surprising combo of monster body parts is a vinegaroon, also known as a whip scorpion. It’s in a group of animals called arachnids, that includes scorpions and spiders.

But it doesn’t sting like a scorpion, or hunt with a web like many spiders. A vinegaroon has its very own style.

This tail may look dangerous, but it’s actually a finely tuned sensor. It picks up vibrations and chemicals in the air, in this case, to stalk its prey.

Up front, those antennae-looking things are actually specialized legs. They help the vinegaroon feel its way around. It’s basically blind. So it relies on touch and smell to close in on its meal. It will break through this cricket’s tough exoskeleton with its claws and bristly mouth.

The vinegaroon also uses these wicked claws to excavate its burrow. Adults and their young use the burrows for protection from predators, and to stay out of the scorching desert sun.

Vinegaroons and their ancestors have survived this way for hundreds of millions of years. So, what does it need that spray for? Researchers observe it by gently holding the animal with forceps.

Despite those frightening looks, this surprising spritz is actually its strongest defense against anything that wants to eat them – like skunks, raccoons or coyotes. Even with poor eyesight, the vinegaroon sprays with incredible accuracy.

Inside, two pygidial glands, also known as “stink glands,” hold the foul fluid. The base of the tail is extremely flexible, and can aim the blast in any direction.

Touché, skunk!

The instant it sprays, the gland openings appear as two retractable nozzles. An adult vinegaroon can shoot up to five times before it needs to let its stink glands fill up again.

The spray reeks. That’s because the solution is mostly acetic acid, the same stuff in the vinegar in your salad dressing, except this cocktail is 16 times stronger. A blast of that to the face of a larger predator is like pepper spray.

While the vinegaroon’s signature defense is unlikely to do any lasting damage, it will certainly leave a lasting impression.

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