Milan Radisics / Aerial shot of mining waste and other toxic by-products collected in dry stacks and a big pond, in a large copper mining and hydrometallurgical process plant complex near Gerena, Seville, Spain, Augu...

Derek Galon / Shipwreck washed ashore by hurricane Maria. Dominica, December 2017. Stitched panorama. Wrecks like this appear picturesque but may release toxic materials from the hulls.

Chien Lee / Kokoe Poison Dart Frog (Phyllobates aurotaenia), Utria National Park, Colombia

Chien Lee / Condoto Stubfoot Toad (Atelopus spurrelli), Utria National Park, Colombia

Mick Jenner / Water vole (Arvicola amphibius) feeding on plastic, West Sussex, England, UK.

Juergen Freund / Paralytic tick (Ixodes holocyclus) with engorged body on human hand, this species affects many species, Spectacled flying fox (Pteropus conspicillatus) among them and infects them with a toxin that ca...

Alex Mustard / Emperor shrimp (Periclimenes imperator / Zenopontonia rex) hitchhiking on large t-bar nudibranch (Ceratosoma trilobatum) The shrimp gains food source and protection on the toxic seaslug. Bitung, North...

Cyril Ruoso / Komodo Dragon (Varanus komodoensis) drooling, the lizard's saliva is high in bacteria and bites quickly become infected, Rinca Island, Komodo National Park, Indonesia

Roland Seitre / Harlequin Poison Dart Frog (Dendrobates histrionicus) in defensive posture, native to South America

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...

Alex Mustard / Flamingo tongue (Cyphoma gibbosum) feeding on a seafan (Gorgonia ventalina) Cyphomas feed on corals and concentrate the toxic chemicals into their mantle, which they then wrap around the outside of it...

Chris Gomersall / 2020VISION / Sooty shearwater (Puffinus griseus) adult in flight over Irish sea off Pembrokeshire coast, Wales, UK, August 2010. Did you know? Hitchcock's film 'The Birds' was partly inspired by an incident in Mon...