John Shaw / Hybrid Poplar tree plantation in autumn (Populs sp.). Boardman Tree Farm, near Irrigon, Oregon, USA. October.

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.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius), climbing a walnut tree, Wallonia, Belgium. September.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius), climbing a walnut tree, Wallonia, Belgium. September.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius), climbing a walnut tree, Wallonia, Belgium. September.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius), climbing a walnut tree, Wallonia, Belgium. September.

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