Philippe Clement / Close up of European birthwort (Aristolochia clematitis) in flower, native to Europe, June

Paul Harcourt Davies / Cretan Birthwort (Aristolochia cretica) a plant endemic to Crete, April and Karpathos, near Plakias, Crete, April

Adrian Davies / Calico flower (Aristolochia elegans)

Winfried Wisniewski / Ruff (Philomachus pugnax) male flying at lek, Varanger Peninsula, Norway

Florian Möllers / Birthwort (Aristolochia clematitis) flowers and leaves, Berlin, Germany, June

Philippe Clement / European wild ginger / Asarabacca / Haselwort / Wild Spikenard (Asarum europaeum) Belgium

Wild Wonders of Europe / della Ferrera / Turopolje piglets (rare breed) in a Slavonian / Common oak (Quercus robur) and Ash (Fraxinus sp) forest, near Mužilovcica village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region,...

Wild Wonders of Europe / della Ferrera / Trees in flood water, mainly White willow (Salix alba) with some White mulberry (Morus alba) Aspen, Poplar and Ash trees, Kazanc area, Livanjsko Polje (karst plateau) Bosnia and Herzegovina, May 2009

Juan Manuel Borrero / Ash (Fraxinus excelsior) beside the Jandula river, Sierra de Andujar Natural Park, Jaen, Spain. April 2009.

Juan Manuel Borrero / Ash (Fraxinus excelsior) beside the Jandula river, Sierra de Andujar Natural Park, Jaen, Spain. April 2009.

Wild Wonders of Europe / Radisics / Close-up of Birthwort (Aristolochia clematitis) flower, Lake Skadar National Park, Montenegro, May 2008

Nick Upton / Common Lilac tree (Syringa vulgaris) flowering in a garden, Hertfordshire, UK, spring.