Ingo Arndt / Cecropia moth caterpillar with warning coloration {Hyalophora cecropia} North America

Chien Lee / Red Stink Bug (Pycanum rubeus) hatchlings cluster to amplify the effect of their aposematic warning coloration, Malaysia

Piotr Naskrecki / Tessaratomid (Tessaratomidae) nymph with warning coloration, Papua New Guinea

Michael & Patricia Fogden / Harlequin Frog (Atelopus varius) displaying warning coloration, Monteverde, Costa Rica

Piotr Naskrecki / Spiked Spider (Gasteracantha sp) their abdomen, or opisthosoma, is heavily sclerotized and armed with hard spines possibly to protect against birds and lizards, Solomon Islands

Michael & Patricia Fogden / Clark's Coral Snake (Micrurus clarki) venomous snake with warning coloration, rainforest, Costa Rica

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

Tony Phelps / Yellow bellied toad {Bombina variegata} warning display Europe

Constantinos Petrinos / Flamboyant cuttlefish (Metasepia pfefferi) adult female. After laying her eggs inside a coconut shell, the female is leaves the arear jetting away for a short distance while displaying its vibrant war...

Constantinos Petrinos / Flamboyant cuttlefish (Metasepia pfefferi) adult female. After laying her eggs inside a coconut shell, the female is leaves the arear jetting away for a short distance while displaying its vibrant war...

Ingo Arndt / Cecropia moth caterpillar close up with warning coloration {Hyalophora cecropia} North America

Jen Guyton / Caterpillar (Megalopygidae) captive in a butterfly house in Monteverde, Costa Rica. This caterpillar shows aposematic, or warning coloration.