Mark Hamblin / 2020VISION / Hen harrier (Circus cyaneus) female hovering over moorland, Glen Tanar Estate, Deeside, Scotland, UK, June. Photographer quote: "I'd been in the hide for over 5 hours when I heard the distant call of...

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...

Tony Phelps / Warning sign explaining that rhino horns within reserve are poisoned and coloured. Private game reserve, near Ceres, Karoo, South Africa, November

Ann & Steve Toon / Confiscated poisoned arrows used in elephant poaching, Mbirikani group ranch, Chyulu Hills, Amboseli-Tsavo ecosystem, Kenya, October 2012

Ann & Steve Toon / Big Life ranger demonstrating poisoned arrow used in elephant poaching, Mbirikani group ranch, Chyulu Hills, Amboseli-Tsavo ecosystem, Kenya, October 2012

Ingo Arndt / Brown Rat (Rattus norvegicus) trio found dead after baiting, South Georgia Heritage Trust Rat Eradication Project, Grytviken, South Georgia Island

Juergen Freund / Shorthead fang blenny / Striped poisoned-fang blenny (Petroscirtes breviceps). Lembeh Strait, North Sulawesi, Indonesia.

Suzi Eszterhas / Mara Conservancy ranger uncovering poisoned bow and arrows belonging to poacher, Serengeti National Park, Tanzania

Suzi Eszterhas / California Sea Lion (Zalophus californianus) in rehab center on EEG being tested for domoic acid poisoning from algal blooms, Marine Mammal Center, Marin county, California

Mark Moffett / Embera Choco Indian making a blowgun for hunting with poisoned darts, Colombia

Mark Moffett / Embera Choco Indian making a blowgun for hunting with poisoned darts, Colombia

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) specimen with high levels of PCB and Mercury in its system held by physiologist Graham Worthy, Texas

Norbert Wu / Simulated specimen collecting for the aquarium fish trade, demonstrating the use of cyanide to stun fish which kills coral reefs as a side effect, Philippines

Michael Quinton / Common Loon (Gavia immer) washed up dead on the shore possibly a victim of Mercury poisoning, Florida