Suzi Eszterhas / Southern sea otter (Enhydra lutris) researcher Tim Tinker and veterinarian Dr. Mike Murray handling anesthetized otter after taking blood samples and tagging flippers, Big Sur Coastline, California, U...

Tui De Roy / Wolf Volcano giant tortoise (Chelonoidis nigra becki) Galapagos National Park team, taking blood samples for DNA analysis, Isabela Island, Galapagos

Pete Oxford / Female Jaguar (Panthera onca) under anaesthetic having blood taken from jugular vein for biometric data and physiological samples for a relocation project, captive, Fundacion Santa Martha Centro de Re...