Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering underwater, Cumbria, England, UK, September. Did you know? The latin name for this genus 'Ranunculus' comes from the Latin for 'Litte...

Linda Pitkin / 2020VISION / Split-level view of the River Leith, showing Water-crowfoot (Ranunculus fluitans subsp. penicillatus) growing underwater, Cumbria, England, UK, September. Did you know? Cumbria is one of the least den...

Sandra Bartocha / Common Water-Crowfoot (Ranunculus aquatilis) with reflections in water, June

Sandra Bartocha / Common Water-Crowfoot (Ranunculus aquatilis) June

Linda Pitkin / 2020VISION / Aquatic plants in River Itchen: Blunt-fruited Water-starwort (Callitriche obtusangula), and Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans). Ovington, Hampshire, England, May.

Inaki Relanzon / Rocks at water edge with reflection and Water crowfoot (Ranunculus peltatus) flowering, National Park Los Barruecos, Malpartida de Caceres, Spain, March 2011

Michel Roggo / Underwater landscape with River water-crowfoot (Ranunculus fluitans) Rhine river, Switzerland, June

Wild Wonders of Europe / della Ferrera / Flowering Thread-leaved water-crowfoot (Ranunculus trichophyllus) plants in the middle of a season river, Northern part of the Livanjsko Polje (karst plateau) Zdralovac area, Bosnia and Herzegovina, M...

Marie Read / Eared grebe (Podiceps nigricollis), adult in breeding plumage, swimming amidst Water crowfoot flowers, (Ranunculus aquatilis) flowers, Benton Lake National Wildlife Refuge, Montana, USA, July.

Konrad Wothe / Slow motion clip of a male Banded demoiselle (Calopteryx splendens) on River water-crowfoot (Ranunculus fluitans), Bavaria, Germany, June.

Konrad Wothe / Chub (Squalius cephalus) swimming, with a male Banded demoiselle (Calopteryx splendens) resting on River water-crowfoot (Ranunculus fluitans), Bavaria, Germany, June.

Konrad Wothe / Slow motion clip of a Banded demoiselle (Calopteryx splendens) on River water-crowfoot (Ranunculus fluitans), Bavaria, Germany, June.

Loic Poidevin / Black-winged stilt (Himanthopus himanthopus) in water with Common water-crowfoot (Ranunculus aquatilis) flowers, Vendeen Marsh, France, April

Terry Whittaker / Water vole (Arvicola amphibius) feeding on White water-crowfoot (Ranunculus aquatilis), Kent, England, UK. October.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Whitewater-crowfoot (Ranunculus aquatilis), Kent, England, UK. October.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on White water-crowfoot (Ranunculus aquatilis), Kent, England, UK. October.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on White water-crowfoot (Ranunculus aquatilis), Kent, England, UK. October.

Terry Whittaker / Water vole (Arvicola amphibius) juvenile feeding on Water crowfoot (Ranunculus fluitaris) Kent, UK June

Terry Whittaker / Water vole (Arvicola amphibius) juvenile feeding on Water crowfoot (Ranunculus fluitaris) Kent, UK June

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Water crowfoot (Ranunculus sp) Kent, UK May

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Water crowfoot (Ranunculus sp) Kent, UK May

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Water crowfoot (Ranunculus sp) Kent, UK May

Terry Whittaker / Water vole (Arvicola amphibius) feeding on Water crowfoot (Ranunculus sp) Kent, UK May

Nick Upton / Round-leaved crowfoot (Ranunculus omiophyllus) flowering in a boggy pool on the edge of Bodmin Moor, Davidstow Woods, Cornwall, UK, April.

Nick Upton / Fisheye lens view of Common water-crowfoot (Ranunculus aquatilis) flowering in a pond fringed by Common gorse bushes (Ulex europaeus), Brecon Beacons National Park, Powys, Wales, UK, May.

Nick Upton / Fisheye lens view of Common water-crowfoot (Ranunculus aquatilis) flowering in a pond fringed by Common gorse bushes (Ulex europaeus), Brecon Beacons National Park, Powys, Wales, UK, May.

Nick Upton / Common gorse bushes (Ulex europaeus) fringing a pond with a mass of flowering Common water-crowfoot (Ranunculus aquatilis), Brecon Beacons National Park, Powys, Wales, UK, May.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis) North Holland. June.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis) Rotterdam, Holland. August.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis) North Holland. July.

Willem Kolvoort / Mating Damselflies (Coenagrionidae) on Common water crowfoot (Ranunculus aquatilis) North Holland. July.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis), North Holland. July.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis) with eggs of the Edible Frog (Pelophylax esculentus) in garden pond, Holland. May.

Willem Kolvoort / Common water crowfoot (Ranunculus aquatilis) with Great Pond Snail (Lymnaea stagnalis) in garden pond, Holland. May.

Willem Kolvoort / Marsh marigold (Caltha palustris) with Mannagrass (Glyceria fluitans) and Common water crowfoot (Ranunculus aquatilis) along brook, North Holland. April.

Willem Kolvoort / Marsh marigold (Caltha palustris) with Mannagrass (Glyceria fluitans) and Common water crowfoot (Ranunculus aquatilis) along brook with seep inflow, North Holland. April.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on water crowfoot, Kent, England, UK, August.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on water crowfoot, Kent, England, UK, September.

Terry Whittaker / Water vole (Arvicola amphibius) feeding on water crowfoot, Kent, England, UK, September.

Nick Upton / Common water-crowfoot (Ranunculus aquatilis) flowering in a small pond, Marlborough Downs, Wiltshire, UK, June.

Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering, River Leith, Cumbria, England, UK, September.

Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering underwater, Cumbria, England, UK, September.

Linda Pitkin / 2020VISION / Split-level view of the River Leith, showing Water-crowfoot (Ranunculus fluitans subsp. penicillatus) growing underwater, Cumbria, England, UK, September.

Linda Pitkin / 2020VISION / Split-level view of the River Leith, showing Water-crowfoot (Ranunculus fluitans subsp. penicillatus) growing underwater, Cumbria, England, UK, September.

Linda Pitkin / 2020VISION / Aquatic plants in River Itchen: Fool's-water-cress (Apium nodiflorum), and Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans). Ovington, Hampshire, England, May.

Linda Pitkin / 2020VISION / Aquatic plants in River Itchen: Fool's-water-cress (Apium nodiflorum), and Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans). Ovington, Hampshire, England, May.

Linda Pitkin / 2020VISION / Aquatic plants in River Itchen: Fool's-water-cress (Apium nodiflorum), and Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans). Ovington, Hampshire, England, May.

Inaki Relanzon / Water crowfoot (Ranunculus peltatus) flowering with reflection in water, National Park Los Barruecos, Malpartida de Caceres, Spain, March

Will Watson / Male Smooth Newt (Lissotriton / Triturus vulgaris) against Common Water Crowfoot (Ranunculus aquatilis). Captive. Herefordshire, UK, April.

Will Watson / Male Smooth Newt (Lissotriton / Triturus vulgaris) in breeding condition against Common Water Crowfoot (Ranunculus aquatilis). Captive. Herefordshire, UK, April.

Michel Roggo / Underwater landscape with River water-crowfoot (Ranunculus fluitans) Rhine river, Switzerland, June

Michel Roggo / Underwater landscape with River water-crowfoot (Ranunculus fluitans) Rhine river, Switzerland, June

Willem Kolvoort / Split level view of Pond water crowfoot (buttercup) (Ranunculus peltatus) Lake Naarden, Holland

Simon Colmer / Chalk-stream water crowfoot (Ranunculus penicillatus), Mill Lawn Brook, New Forest, Hampshire, UK.

Jose B. Ruiz / Water crowfoot {Ranunculus peltatus} Parque natural de los Barruecos, Malpartida de Cáceres, Spain.

Jose B. Ruiz / Water crowfoot {Ranunculus peltatus} Parque natural de los Barruecos, Malpartida de Cáceres, Spain.

Philippe Clement / Pond water crowfoot {Ranunculus peltatus} Belgium

Sumio Harada / White-tailed Deer (Odocoileus virginianus) doe feeding on Common Water-crowfoot (Ranunculus aquatilis) on lake shore, Glacier National Park, Montana

Will Watson / River crowfoot (Ranunculus fluitans) in flower, River Lugg SSSI, Leominster, Herefordshire, England, UK. July.

Will Watson / Common water crowfoot (Ranunculus aquatilis) covering an Ice Age pond surrounded by Oak (Quercus sp.) and Sweet chestnut (Castanea sativa) trees, Moccas Park National Nature Reserve, Hereforshire, En...

Will Watson / Common water crowfoot (Ranunculus aquatilis) covering an Ice Age pond surrounded by Oak (Quercus sp.) and Sweet chestnut (Castanea sativa) trees, Moccas Park National Nature Reserve, Hereforshire, En...

Will Watson / Common water crowfoot (Ranunculus aquatilis) and Water starwort (Callitriche sp.) growing in pond, Sturts Nature Reserve, Herefordshire, England, UK. April.

Will Watson / Pond water crowfoot (Ranunculus peltatus) with pear-shaped nectary, kettle hole pond, Herefordshire, England, UK.

Will Watson / Hopton Castle, a 13th Century fortified tower house, and medieval moat carpeted with Pond water crowfoot (Ranunculus peltatus), Shropshire Hills Area of Outstanding Natural Beauty, England, UK. June,...

Mike Read / Common water crowfoot (Ranunculus aquatilis) growing in a stream near Wimborne St Giles, Dorset, England, UK, May.

Simon Littlejohn / Family of European otters (Lutra lutra) feeding and playing amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Family of European otters (Lutra lutra) feeding amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, one juvenile climbing over the adult's back, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Family of European otters (Lutra lutra) feeding amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Family of European otters (Lutra lutra) feeding amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Family of European otters (Lutra lutra) swimming downstream, feeding amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Simon Littlejohn / European otter (Lutra lutra) feeding amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Michel Roggo / River water-crowfoot (Ranunculus fluitans), with Hydra (Hydra sp), attached. River Aare, Berne, Switzerland, October. Photographed for The Freshwater Project.

Linda Pitkin / Aquatic plants in river: Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans), rare/ scarce plant in Surrey, and Water-starwort (Callitriche agg.). River Wandle, near Colliers Wood,...

Linda Pitkin / Aquatic plants in river: Stream Water-crowfoot (Ranunculus penicillatus subsp. pseudofluitans), rare/ scarce plant in Surrey, and Water-starwort (Callitriche agg.). River Wandle, near Colliers Wood,...

Willem Kolvoort / Edible frog (Pelophylax esculentus) frogspawn amongst Common water-crowfoot (Ranunculus aquatilis) in garden pond. Netherlands. May.

Michel Roggo / River water-crowfoot (Ranunculus fluitans), with Hydra (Hydra sp), attached, the Aare river. Brügg, Canton of Berne, Switzerland.October. Photographed for The Freshwater Project.