Saturniid moth caterpillar, Automeris sp., from Belize.
Flannel Moth caterpillar, genus Megalopyge, from Belize. These larvae sport venomous spines that can cause a painful sting and inflammation, and sometimes other unpleasant sensations like headache and nausea.
A well-camouflaged owlet moth caterpillar, family Noctuidae, from Iowa.