Will Watson / Environment Agency Fishery and Biodiversity Officers observing Minnow trap catch from an irrigation pool, during national programme to eradicate Topmouth Gudgeon, Herefordshire, England, UK, July 2017...

Will Watson / Environment Agency Fisheries Officer releasing Minnow traps from an irrigation pool, during national programme to eradicate Topmouth Gudgeon, Herefordshire, England, UK, July 2017.

Cheryl-Samantha Owen / Rainbow trout (Oncorhynchus mykiss) caught in net as part of an eradication program, Krom River, Cedarberg Mountains, Western Cape, South Africa. A species introduced to the Krom River for angling pur...

Cheryl-Samantha Owen / An employee from 'Cape Nature', a government conservation department, fishing for introduced Rainbow trout (Oncorhynchus mykiss) in an attempt to eradicate them from the Krom River, Cedarberg Mountain...

Pete Oxford / Leg-hold traps, which are used illegally to eradicate predators, Sierra de Andujar Natural Park, Andalusia, Spain

Pete Oxford / Leg-hold traps and wire snares which are used illegally to eradicate predators, Sierra de Andujar Natural Park, Andalusia, Spain

Jane Burton / Vet injecting a red male Guinea pig to eradicate skin mites

Nigel Cattlin / Ragwort (Jacobaea vulgaris) yellow star-shaped flowers with ray and disc florets, some older and darker. Poisonous to livestock, Berkshire, July

Nigel Cattlin / Ragwort (Jacobaea vulgaris) yellow star-shaped flowers with ray and disc florets, some older and darker. Poisonous to livestock, Berkshire, July

Paul D Stewart / Sailing ship off Galapagos (Daphne Major island in background) and Giant Tortoise (Chelonoidis nigra), photo composite. The Galapagos were visited by Charles Darwin in his Beagle voyages and also by a...

Paul D Stewart / Illustration of 'Albemarle Island' (now Isabela) engraving by Huyot and Bepard facing page 520 in 'All Around the World' published in 1872 by William Collins & Son. Shows the large caldera of a volcan...

Paul D Stewart / Illustration of 'Albemarle Island' (now Isabela) hand coloured engraving by Huyot and Bepard facing page 520 in 'All Around the World' published in 1872 by William Collins & Son. Shows the large calde...