Silvia Reiche / Oldworld Swallowtail (Papilio machaon) caterpillar on fennel, Netherlands

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

Ingo Arndt / Cup Moth (Acharia nesea) caterpillar, Costa Rica

Alex Hyde / Indian moon / Indian luna Moth (Actias selene) close up of defensive spines on caterpillar. Captive.

Piotr Naskrecki / Looper Moth (Geometridae) caterpillar with aposematic coloration, Atewa Range, Ghana

Alex Hyde / Grey caterpillar covered in defensive spines, photographed on a white background. Maroantsetra, Northeast Madagascar

Wild Wonders of Europe / Benvie / Caterpillar (unknown species) Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008 WWE OUTDOOR EXHIBITION

Ingo Arndt / Blue Morpho (Morpho peleides) caterpillar hatching out of egg, Costa Rica

Ingo Arndt / Blue Morpho (Morpho peleides) caterpillar hatching out of egg, Costa Rica

Duncan Mcewan / Miller moth larva on birch leaf, UK

Hans Christoph Kappel / Poplar Admiral caterpillar feeding. Life cycle sequence 1

Hans Christoph Kappel / Poplar Admiral caterpillar pupating. Life cycle sequence 2