Philippe Clement / Western Black widow (Latrodectus hesperus) spider leaving burrow / hole in wall. Arizona, USA

Laurie Campbell / Yew berries (Taxus baccata) Berwickshire, Scotland, September

Juergen Freund / Common lionfish (Pterois volitans) seen from the rear. Lembeh Strait, North Sulawesi, Indonesia

Georgette Douwma / Seasnake on beach beside tourist {Laticauda laticaudata} Ile de Maitre, New Caledonia, Pacific

Edwin Giesbers / Asian giant forest scorpion (Heterometrus longimanus) with tail raised, Sarawak, Borneo, Malaysia

Claudio Contreras / African horned viper (Cerastes cerastes), captive.

Daniel Heuclin / White-lipped / Green tree viper (Cryptelytrops albolabris) captive, from SE Asia

Axel Gomille / Indian / Asian / Spectacled Cobra (Naja naja) raising its hood in a threat display. Karnataka, India.

Guy Edwardes / Mozambique Spitting Cobra (Naja mossambica) ejecting venom Kruger, South Africa, Controlled conditions.

Anup Shah / African lion {Panthera leo} lioness snarling, Masai Mara GR, Kenya

Angelo Gandolfi / European Grey wolf (Canis lupus) snarling, showing teeth, captive, Parc National du Mercantour, France

Bryan and Cherry Alexander / Male Grey wolf (Canis Lupus) snarling. Montana, USA.