Beware of Something Cute and Fuzzy in East Coast and Southern Trees–It Could Be Venomous

The Puss Caterpillar may look "fuzzy and cute," but packs a punch with stinging venom. (Courtesy, Donald Hall, professor emeritus, The University of Florida)

PUNTA GORDA, Fla.–Something small and fuzzy—and somewhat cute—is crawling all over Florida this time of year.

But those innocent-looking bristles covering the inch-long tawny caterpillars can deliver a painful, venomous sting. Look, but don’t touch,  experts warn.

Puss Caterpillars can be seen almost year-round, but mainly during the late summer and fall months. In the past few weeks, they’ve even been spotted at Disney World.

According to the Fish and Wildlife Foundation of Florida, the caterpillars are about an inch long and covered in hair-like bristles with an orange streak running down their back. They are classified as an insect and can be found on oak and elm trees during the summer and fall months.

John Cannon, owner and operator of Treemendous Tree and Nursery in North Port said he has been stung “numerous times” by the caterpillar and that “it ain’t no fun.”

John Cannon, owner and operator of Treemendous Tree and Nursery in North Port Fla. has been stung by a venomous caterpillar "numerous times." Sept. 2022 (Courtesy, Treemendous Tree and Nursery)

In the course of his day, Cannon will climb trees to trim them and, while standing under a tree supervising others, may also get hit by falling tree foliage.

“I consider myself to be a pretty tough individual,” Cannon told The Epoch Times. “When I got stung, it almost made me cry like a little girl.”

The sting of this caterpillar equates to one that “feels almost like being stung by a Portuguese man o' war or a jellyfish,” Bill Kern, Associate Professor at the University of Florida, told The Epoch Times.

“The reaction is generally local–so it’s going to be painful,“ he said. ”And, in some cases, if you actually get one down your shirt, you can get numerous stings.”

Kern said that, depending on how much pressure is placed on the caterpillar and the person being stung, you can sometimes see a “red grid-like pattern” that looks like the pattern of the venomous spines on the caterpillar.

Venomous spines on the bottom of the Puss Caterpillar. (Courtesy, Donald Hall, professor Emeritus, University of Florida)

The caterpillars will eventually turn into moths and their purpose in life is to “reproduce and produce new models for the next generation,” he said.

“They’re pretty well protected from most vertebrates,” Kern said. “Most vertebrates can’t, or won’t, feed on them—at least [not] after the first time.”

The professor said the name “puss caterpillar” is likely a reference to its resemblance to a cat with soft fur and a tail, but unlike cats, this fuzzy critter packs a venomous punch. So much so that University of Florida experts have labeled it as “the most venomous caterpillar in the United States.”

On the UF/IFAS Creature Feature website it says the “moths and their associated larvae are very much part of Florida’s native fauna, and both adults and larvae provide eco-services such as being prey items (the adult moths especially, but even the larvae are parasitized by wasps & flies, and sometimes directly consumed by vertebrates such as lizards … at least once) and the recycling of abandoned larval cocoons used as retreats for shelter or brooding young (e.g., spiders, ants, wasps).”

The Puss Caterpillar will eventually turn into a Puss Flannel Moth. (Courtesy, Donald Hall, professor emeritus, The University of Florida)

Parents need to warn their children about these caterpillars, Kern said.

“I do not have any data on this, but I think little girls are more apt to try to pick it up because it is furry and they would want to pet it,” he said. “However, little boys are more likely to take a stick and poke at it.”

Pets are not as affected because the caterpillar lives in the tree canopy and most pets are not going to be up there, he said.

“It is less likely that a pet will be exposed to it—more likely cats than anything,” he said. “The caterpillars are normally six feet above the ground.”

The Fish and Wildlife Foundation website described the caterpillars as having “attractive hairs” that hide “extremely toxic spines.” When someone comes in contact with their skin, they will sting you and it can be “incredibly painful.”

Lisa Thompson, of Florida Fish and Wildlife Conservation Commission (FWC), said that the caterpillars do not seek out people to bite and the public should not fear them, but take care to admire them from a safe distance.

“This species of caterpillar has venomous spines hidden amidst an extremely hairy/furry body to protect itself from predators; however, unless directly handled, they do not pose a threat to people,” Thompson told The Epoch Times in an email. “They’re also beautiful and ornate; if you observe one, simply appreciate (it) from a distance.”

Kern agreed and offered advice on how to deal with a sting from the caterpillar.

“Probably the most common thing to do is take a piece of tape and make sure that all of the stinging hair has been removed from the skin,” he said. “That will reduce how much venom gets into the skin.”

After removing the spines you may want to apply an ice pack to the affected area for swelling; also, hydrocortisone cream and taking an oral antihistamine might bring some relief, Kern said.

The Puss Caterpillar may look "fuzzy and cute" but look, don't touch; experts say, they're venomous. (Courtesy, Donald Hall, professor Emeritus, The University of Florida)

That is advice that Cannon said he can get behind.

“I never thought of tape before,” he said. “In the past, I'd try to find someone who has a cigarette or tobacco, wet it, and apply to the affected area; that draws out some of the venoms. All I know is that it hurts.”

Allergic reactions have not been recorded in association with the caterpillar stings, but Kern said he would not rule it out.

“You’d have to have been stung previously (to get an allergic reaction),” he said. “You don’t have an allergic reaction based on one incident.”

Kern said the caterpillars are highly unlikely to sting a lot of people because they are in the canopy of hardwood trees.

The Puss Caterpillar comes from the larvae of the southern flannel moth that is native to the southern states but has been known to be found as far north as New Jersey and as far west as Arizona, Kern said.

Cannon said his advice to anyone moving to or visiting Florida is to remember that everything in Florida “has teeth and bites.”

“Everything here bites,” he said, partly in jest. “From mosquitoes to alligators–people need to know and respect this about Florida.”