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Beware: Asps!!

June 5, 2022 by naomibrown

Deadly Asp caterpillar
…“flannel moth” caterpillar or Asp

According to Texas A & M University, the Megalopyge opercularis also known as “flannel moths” are here and dangerous!

The caterpillar larval form of the flannel moth, grow to about 1 inch long and have long “furry” looking “hair”. This “hair” can be fluffy and look stroke-worthy. But don’t touch it!

Also known as asps, these caterpillars tend to live in trees and bushes, and must be avoided as their setae, or “hairs”, are venomous.

Although these asp caterpillars tend to be nocturnal (active at night), look cute, stroke-able, and touch-able, they should never be touched.

Be careful when you or children are playing in or around trees. The caterpillars can land on your bare skin, discharging their venom.

The result? Skin irritation or even death!

NEVER touch any caterpillar!

There are several stinging caterpillars in Texas. The caterpillars of the io moth Automeris io (Fabriciu saturniidae); the hag moth, Phobetron pithecium, and the buck moth, Hemileuca maia, as well as the saddleback caterpillar, Sibine stimulea, should all be avoided.

Although adult moths tend to not be poisonous, it’s better to avoid any life form you do not completely understand.

Filed Under: Blog, Insects

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Texas Master Naturalist Coastal Prairie Chapter

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(832) 225-6936

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