Alex Hyde / Aposematism describes the use of bright colouration and bold patterns to advertise that an organism is unpalatable or dangerous. All three insects are foul-tasting or toxic if eaten: Wood Tiger moth...

Piotr Naskrecki / Fulgorid Planthopper (Fulgoridae) spreading wings to show aposematic coloration, Costa Rica

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

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

Hiroya Minakuchi / Kunie's Chromodorid Nudibranch (Chromodoris kuniei), Borneo, Malaysia

Hiroya Minakuchi / Nudibranch (Hypselodoris bullockii) pair mating, Borneo, Malaysia

Thomas Marent / Dyeing Poison Frog (Dendrobates tinctorius), Kaw, French Guiana

Thomas Marent / Alpine Newt (Ichthyosaura alpestris) male, Switzerland

Thomas Marent / Alpine Newt (Ichthyosaura alpestris) male, Switzerland

Thomas Marent / Alpine Newt (Ichthyosaura alpestris) male, Switzerland

Thomas Marent / Alpine Newt (Ichthyosaura alpestris) female, Switzerland

Piotr Naskrecki / Grasshopper with aposematic coloration aerates toxic blood as a defensive behavior, Kwazulu Natal, South Africa

Piotr Naskrecki / Grasshopper with aposematic coloration, Maloti Mountains, Lesotho, South Africa

Piotr Naskrecki / Milkweed Grasshopper (Phymateus morbillosus) member of the Foam grasshopper family has aposematic coloration, South Africa

Piotr Naskrecki / Katydid (Moncheca sp), newly discovered species, with red gland that shoots chemicals as a defense mechanism, Suriname

Piotr Naskrecki / Cockroach with aposematic coloration, Suriname

Piotr Naskrecki / Giant Crab Spider (Sparassidae), Suriname

Piotr Naskrecki / Giant Crab Spider (Sparassidae), Suriname

Piotr Naskrecki / Dyeing Poison Frog (Dendrobates tinctorius), Suriname

Piotr Naskrecki / Assassin Bug (Reduviidae), Suriname

Piotr Naskrecki / Leafhopper (Cicadellidae) nymph, Suriname

Piotr Naskrecki / Spiny Spider (Micrathena cyanospina), Suriname

Piotr Naskrecki / Leafhopper (Cicadellidae), Estabrook Woods, Concord, Massachusetts

Piotr Naskrecki / Leafhopper (Cicadellidae), Estabrook Woods, Concord, Massachusetts

Ingo Arndt / Leaf Beetle (Ischnocodia annulus) with aposematic coloration, Costa Rica

Ingo Arndt / Leichhardt's Grasshopper (Petasida ephippigera) on Pityrodia (Pityrodia jamesii) plant, Kakadu National Park, Northern Territory, Australia

Ingo Arndt / Leichhardt's Grasshopper (Petasida ephippigera) on Pityrodia (Pityrodia jamesii) plant, Kakadu National Park, Northern Territory, Australia

Hiroya Minakuchi / Strawberry Poison Dart Frog (Oophaga pumilio), Costa Rica

Pete Oxford / Katydid (Copiphora sp), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Assassin Bug (Reduviidae), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Millipede (Pseudopolydesmus sp), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Banded Tree Snake (Tripanurgos compressus), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Banded Tree Snake (Tripanurgos compressus), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Banded Tree Snake (Tripanurgos compressus), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Two-horned Bug (Euagona diana), Yasuni National Park, Amazon Rainforest, Ecuador

Konrad Wothe / Red Stink Bug (Pycanum rubeus), also known as a Shield Bug, Sabah, Borneo, Malaysia

Thomas Marent / Strawberry Poison Dart Frog (Oophaga pumilio) on mushroom, Tortuguero National Park, Costa Rica

Thomas Marent / Beebe's Rocket Frog (Colostethus beebei), Kaieteur National Park, Guyana

Thomas Marent / Harlequin Poison Dart Frog (Dendrobates histrionicus) guayacana color morph, Colombia

Thomas Marent / Harlequin Poison Dart Frog (Dendrobates histrionicus) arusi color morph, Colombia

Thomas Marent / Harlequin Poison Dart Frog (Dendrobates histrionicus) codicia color morph, Colombia

Chris Newbert / Scallop (Pectiniidae), Indonesia

Pete Oxford / Longhorn Beetle (Batus barbicornis) with aposematic coloration, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Fungus Beetle (Erotylidae) pair with aposematic coloration, Yasuni National Park, Amazon, Ecuador

Piotr Naskrecki / Dyeing Poison Frog (Dendrobates tinctorius), Sipaliwini, Surinam

Piotr Naskrecki / Koppie Foam Grasshopper (Dictyophorus spumans) in shrubland, Cederberg Wilderness Area, Western Cape, South Africa

Piotr Naskrecki / True Weevil (Curculionidae) with aposematic coloration, Muller Range, Papua New Guinea

Piotr Naskrecki / Sexton Beetle (Nicrophorus sp) with aposematic coloration, Nakanai Mountains, New Britain, Papua New Guinea

Piotr Naskrecki / True Weevil (Curculionidae) with aposematic coloration, New Britain, Papua New Guinea

Piotr Naskrecki / Jumping Spider (Athamas sp) with aposematic coloration, New Britain, Papua New Guinea

ZSSD / Palm Weevil (Rhynchophorus sp) with aposematic coloration, native to Asia

Steve Gettle / Clear-winged Tiger Moth (Cosmosoma sp), Costa Rica

Chien Lee / Weevil (Macrochirus praetor) with aposematic coloration, Taman Negara, Kelantan, Malaysia

Steve Gettle / Looper Moth (Geometridae), Costa Rica

Suzi Eszterhas / Moth caterpillar in defensive posture, Danum Valley Conservation Area, Malaysia

Piotr Naskrecki / Tomentose Burying Beetle (Nicrophorus tomentosus) with aposematic coloration, Woburn, Massachusetts

Piotr Naskrecki / Scarab Beetle (Chrysina sp) with aposematic coloration, Tapanti National Park, Cartago, Costa Rica

Piotr Naskrecki / Clear-winged Tiger Moth (Cosmosoma teuthras) with aposematic coloration, Barbilla National Park, Costa Rica

Piotr Naskrecki / Leaf Beetle (Alurnus ornatus) with aposematic coloration, Barbilla National Park, Costa Rica

Piotr Naskrecki / Leaf Beetle (Alurnus ornatus) with aposematic coloration, Barbilla National Park, Costa Rica

Piotr Naskrecki / Stink Bug (Edessa sp) with aposematic coloration, Barbilla National Park, Costa Rica

Piotr Naskrecki / Clear-winged Tiger Moth (Cosmosoma teuthras) with aposematic coloration, Tapanti National Park, Cartago, Costa Rica

Piotr Naskrecki / Scape Moth (Ctenuchidae) with aposematic coloration, Barbilla National Park, Costa Rica

Piotr Naskrecki / Earwig with aposematic coloration, La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Earwig with aposematic coloration, La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Cup Moth (Limacodidae) aposematically colored caterpillar with spines that can deliver an extremely painful sting, Atewa Range Forest Reserve, Ghana

Piotr Naskrecki / Indigo Walking Stick (Megacrania nigrosulfurea) exhibiting aposematic coloration, Papua New Guinea

Piotr Naskrecki / Spiny Spider (Gasteracantha sapperi) in web, Papua New Guinea

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

Piotr Naskrecki / Waxcap (Hygrocybe sp) mushrooms, Connecticut

Piotr Naskrecki / Red-banded Leafhopper (Graphocephala coccinea), Estabrook Woods, Massachusetts

Piotr Naskrecki / Cup Moth (Limacodidae) aposematically colored caterpillar, Ghana

Hiroya Minakuchi / Green And Black Poison Dart Frog (Dendrobates auratus), Costa Rica

Hiroya Minakuchi / Green And Black Poison Dart Frog (Dendrobates auratus), Costa Rica

Mark Moffett / Squash Bug (Coreidae), Santa Rita, Panama

Birgitte Wilms / Nudibranch (Nembrotha sp) pair mating, Solomon Islands

Chien Lee / Raspy Cricket (Phlebogryllacris venosa), Gunung Mulu National Park, Sarawak, Borneo, Malaysia

Chien Lee / Blister Beetle (Horia debyi) male, Lawas, Sarawak, Borneo, Malaysia

Chien Lee / Spotted Stream Frog (Rana picturata) in defensive posture to increase its apparent size and display its aposematic coloration, Kubah National Park, Sarawak, Borneo, Malaysia

Chien Lee / Hasselt's Spiny Spider (Gasteracantha hasselti), Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Chien Lee / Chrysomelid Beetle (Aspidimorpha sanctaecrucis), Cuc Phuong National Park, Ninh Binh, Vietnam

Chien Lee / Net-winged Beetle (Duliticola sp) neotenic female remains in her larval form even when mature, Pulong Tau National Park, Gunung Murud, Sarawak, Borneo, Malaysia

Chien Lee / Net-winged Beetle (Duliticola sp) neotenic female remains in her larval form even when mature, Pulong Tau National Park, Gunung Murud, Sarawak, Borneo, Malaysia

Chien Lee / Katydid (Tettigoniidae) juvenile from the montane forests, Pulong Tau National Park, Gunung Murud, Sarawak, Borneo, Malaysia

Chien Lee / Longjawed Orb Weaver (Opadometa sp) spider, newly discovered species from montane rainforest, Sarawak, Borneo, Malaysia

Chien Lee / Mangrove Cat Snake (Boiga dendrophila) with extended tongue, Jakarta, Java, Indonesia

Chien Lee / Saturniid Moth (Antheraea larissa), Lundu, Sarawak, Borneo, Malaysia

Konrad Wothe / Fire Salamander (Salamandra salamandra) walking, Bulgaria

Chien Lee / Giant Crab Spider (Sparassidae), Lundu, Malaysia

Chien Lee / Giant Crab Spider (Sparassidae), Gunung Penrissen, Borneo, Malaysia

Chien Lee / Giant Crab Spider (Sparassidae), Gunung Penrissen, Borneo, Malaysia

Chien Lee / Squash Bug (Coreidae) juveniles with aposematic coloration, Danum Valley Conservation Area, Malaysia

Chien Lee / Brown Thorny Frog (Chaperina fusca), Danum Valley Conservation Area, Malaysia

Chien Lee / Nymphalid Butterfly (Cethosia sp) caterpillars with aposematic coloration, Kubah National Park, Malaysia

Chien Lee / White-lipped Island Pit Viper (Trimeresurus albolabris insularis) coiled in tree, Jakarta, Indonesia

Chien Lee / Green Tree Python (Morelia viridis) young, Jakarta, Indonesia