Robert Thompson / Fly agaric (Amanita muscaria) Peatlands Park, County Armagh, Northern Ireland, October.

Chris Mattison / Yellow poison dart frog (Phyllobates terribilis) the world's most poisonous amphibian captive from northern South America.

Chris Mattison / Yellow poison dart frog (Phyllobates terribilis) the world's most poisonous amphibian captive from northern South America.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) umbel, Chesil Beach, Dorset, England, UK. May.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flowers against blue sky. Chesil Beach, Dorset, England, UK. May.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flower heads. Growing beside canal, Berkshire, England, UK. June.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flower head. Growing beside canal, Berkshire, England, UK. June.

Nick Upton / Cinnabar moth (Tyria jacobaeae) caterpillar feeding on Ragwort (Jacobaea vulgaris) in meadow. Wiltshire, England, UK. July.

Jack Dykinga / Burrowing owl (Athene cunicularia) female feeding Colorado river toad (Incilius alvarius) to chick. In evening light, Marana, Arizona, USA. May.

Nick Upton / Devil's apple (Solanum linnaeanum) with toxic fruit. Invasive species, native to South Africa. Sardinia, Italy. June.

Heather Angel / Common rue (Ruta graveolens) flower. Cultivated in herb garden, Surrey, England, UK. Native to Balkan Peninsula.

Paul Hobson / Fly agaric toadstool (Amanita muscaria) on river bank, in deciduous woodland. Sheffield, England, UK.