River weed and marsh marigolds (Caltha Palustris) of Lathkill Dale in spring, Peak District National Park, Derbyshire, England, United Kingdom, Europe

Marsh Wren (Cistothorus palustris) calling, Lac Le Jeune Provincial Park, British Columbia, Canada, North America

Marsh Wren (Cistothorus palustris), Lac Le Jeune Provincial Park, British Columbia, Canada, North America

Mugger crocodile (Crocodylus palustris) (Marsh Crocodile) on a riverbank, Chitwan National Park, UNESCO World Heritage Site, Nepal, Asia

An adult mugger crocodile (Crocodylus palustris), basking in the sun, Yala National Park, Sri Lanka, Asia

Indian marsh crocodile, Crocodylus palustris, young Swamp Crocodile in Ranthambhore National Park, Rajasthan, Northern India

Indian marsh crocodile, Crocodylus palustris, Swamp Crocodile in Ranthambhore National Park, Rajasthan, Northern India

Marsh marigolds (kingcups) (Caltha palustris) flowering on flooded Narew sedge marshes, Krzewo, Podlaskie, Poland, Europe

Grass of Parnassus (Parnassia palustris), close up

marsh tit: parus palustris in birch forest, alam pedja nr, estonia

kingcup, caltha palustris, in black alder carr, kemeri np, latvia

Marsh helleborine Epipactis palustris Kenfig National Nature Reserve, Wales, UK, Europe

Marsh helleborine Epipactis palustris Kenfig National Nature Reserve, Wales, UK, Europe

Marsh helleborine Epipactis palustris Kenfig National Nature Reserve, Wales, UK, Europe

Marsh helleborine Epipactis palustris Kenfig National Nature Reserve, Wales, UK, Europe

A Marsh tit (Parus palustris) flies from a branch, Middle Elbe Biosphere Reserve, Germany, Europe

Kingcup, Marsh Marigold (Caltha palustris) in the Eyach Valley, Northern Black Forest, Baden-Wuerttemberg, Germany, Europe

Water Forget-me-not (Myosotis palustris), flowering, wild plant, Germany, Europe

Blackcap (Sylvia atricapilla) adult male nuzzling a Marsh Tit (Poecile palustris) at the pond, June, France