Thomas Marent / Oldworld Swallowtail (Papilio machaon) caterpillar, Switzerland

Ingo Arndt / Puss Moth (Cerura vinula) on stem, Europe

Ingo Arndt / Cecropia Moth (Hyalophora cecropia) caterpillar, close up of head

Mark Moffett / Slug Caterpillar (Setora fletcheri) shows warning coloration and spines loaded with toxins that erect when the animal is disturbed, Tam Dao National Park, Vietnam

Heike Odermatt / Oldworld Swallowtail (Papilio machaon) caterpillar, Netherlands

Paul Bertner / Cup Moth (Idonauton apicalis) caterpillar, Cuc Phuong National Park, Vietnam

Paul Bertner / False Diadem (Pseudacraea lucretia) caterpillar, Udzungwa Mountains National Park, Tanzania

Chien Lee / Sphinx Moth (Elibia dolichus) caterpillar, Malaysia

Chien Lee / Hawk Moth (Sphingidae) caterpillar, Indonesia

Chien Lee / Hawk Moth (Sphingidae) caterpillar, Indonesia

Konrad Wothe / Hawk Moth (Sphingidae) caterpillar in rainforest, Panguana Nature Reserve, Peru

Konrad Wothe / Forester Moth (Cyclosia sp) caterpillars in rainforest, Pucallpa, Peru