Andy Sands / Gatekeeper / Hedge Brown butterfly (Pyronia tithonus) nectaring from flower of common Bistort, Hertfordshire, England, UK, July
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Dave Bevan / Moorhen (Gallinula chloropus) feeding chick in a pond covered with Water smartweed (Persicaria amphibia), Ceredigion, Wales, UK. July.
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Dave Bevan / Pair of Moorhens (Gallinula chloropus) feeding chicks in a pond covered with Water smartweed (Persicaria amphibia), Ceredigion, Wales, UK. July.
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Dave Bevan / Little grebe (Tachybaptus ruficollis) preening, surrounded by Water smartweed (Persicaria amphibia), Ceredigion, Wales, UK. July.
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Paul Harcourt Davies / Bistort flowers (Persicaria bistortum), Piano Grande, Sibillini, Umbria, Italy. June 2016
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Paul Harcourt Davies / Bistort (Persicaria bistortum) flower with hoverfly, Piano Grande, Sibillini, Umbria. June.
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Nick Upton / Meadow bistort (Bistorta officinalis / Polygomum bistorta) flowering in profusion on Piva plateau, near Trsa, Montenegro, July.
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Robert Thompson / Bistort (Polygonum bistorta) near Lac du Bornon, Mercantour National Park, Provence, France, June.
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Radomir Jakubowski / European bistort (Bistorta officinalis) flower, Vosges Mountains, France, June.
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Florian Möllers / Black-veined white butterfly (Aporia crataegi) on Common bistort flower, Germany.
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Florian Möllers / Wetlands meadow with Common bistort (Polygonum bistorta) in a nature reserve in Berlin, Germany.
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Florian Möllers / Common bistort (Bistorta officinalis) flowers, Berlin, Germany.
