Paul Bertner / Scorpion, seen under UV light, Ranomafana National Park, Madagascar

Pascal Tordeux / Walnut (Juglans regia) in field of ripe barley before a storm, Ribemont, Picardy, France.

Pascal Tordeux / Walnut (Juglans) tree in snow and mist. Picardie, France, November.

Pascal Tordeux / Lone Walnut (Juglans) tree in a field of barley. Picardy, France.

Nigel Cattlin / Walnut (Juglans regia), developing leaves , necrotic with frost damage. Berkshire, England, UK. May.

Pascal Tordeux / Walnut tree (Juglans regia) in the middle of a wheat field, Viller Le Sec, Picardy, France. August

Fabrice Cahez / Walnut (Juglans sp) fruit, Vosges, France, September.

Philippe Clement / Fallen green husks / walnuts of the Eastern black walnut (Juglans nigra) tree on the forest floor, native to eastern North America, Belgium, November.

Stephen Dalton / Walnut tree (Juglans regia) in full summer leaf, Sussex, UK

Martin Gabriel / Walnut (Juglans regia) fruits, Bavaria, Germany, July

Yukihiro Fukuda / Japanese squirrel (Sciurus lis) feeding on Walnut (Juglans ailantifolia), Mount Yatsugatake, Nagano Prefecture, Japan. Endemic species.

Yukihiro Fukuda / Japanese squirrel (Sciurus lis) carrying two Walnut (Juglans ailantifolia), Mount Yatsugatake, Nagano Prefecture, Japan, August. Endemic species.

Yukihiro Fukuda / Japanese Walnut (Juglans ailantifolia) Mount Yatsugatake, Nagano Prefecture, Japan, July. Endemic species.