It's the Great Peacock Moth Caterpillar.
See Wikipedia for other images, including a painting of the moth by Van Gogh.
Saturnia pyri, the giant peacock moth, also called the great peacock
moth, giant emperor moth, or Viennese emperor, is a Saturniid moth
which is native to Europe. It is the largest European moth, with a
wingspan reaching 15-20 cm.
That is a White Marked Tussock Moth.
The long, spiky tufts of hairs give fair warning to anyone or anything that tries to touch this species' larva. The caterpillar is covered with them and the chemicals that are transferred onto skin when touched can cause an allergic reaction in humans resulting in redness, irritation and welts.
It also has four ...
We went back today and spoke with the naturalist, Cindy, who's part of a team that cares for that property which includes hundreds of acres.
These are webbed nests filled with hundreds of caterpillars of the fall webworm moth, (Hyphantria cunea). The caterpillars are tiny and hairy, and at the early stage can be any dark color. There's an outer fur that ...
I'm not 100%, but I am going to call that a yellow striped armyworm, Spodoptera ornithogalli. These things seem to be widely distributed and very common; I've seen them frequently in my travels but never bothered to look it up until today.
Here's some additional, more close-up images for comparison:
Here's what it becomes as an adult:
This is a tussock moth caterpillar in the Lymantriidae family.
The image is not clear enough for a definitive ID, but it appears you have some species in the genus Orgyia.
Likely, this is a white-marked tussock moth caterpillar (Orgyia leucostigma).
From Auburn University:
The full-grown larva (Photo 2) is around 35 mm long. The head and shield on ...
There are a few clearly observable differences between the nests of the Eastern tent caterpillar (Malacosoma americanum), often called tentworm and treeworm, and the fall webworm, Hyphantria cunea. The most obvious are the location on the tree and the shape; the timing of building and using the tent; whether or not the caterpillars are seen on the outside of ...