Io Moth Caterpillar
io moth caterpillar
RAIN0975 / FLICKR
What it is: Automeris io
Where it’s from: North America
What to know: This guy might look as harmless as moss or artificial turf, but the io moth caterpillar packs a painful sting. Its trademark spines can cause welts, itching, and redness (nowhere near as bad as the puss caterpillar, though).