Stephen Dalton / Common frog (Rana temporaria) in pondweed, Rookery Wood, Sussex, England, UK. July.

Russell Cooper / Common newt / Smooth newt (Triturus vulgaris) male in breeding colouration. South-west London, UK.

David Tipling / Common frog (Rana temporaria) and spawn underwater in pond. West Runton, North Norfolk, England, UK, March.

Will Watson / Circular mass of Duckweed (Lemna minor) formed as a consequence of vegetative/asexual reproduction located on a pond, Herefordshire, England.

Willem Kolvoort / Common Duckweed (Lemna minor) in brook in central Holland. August.

Will Watson / Red algae (Rhodophyta) and Least Duckweed (Lemna minuta) on Radnorshire pond, Powys, Wales, UK, May.

Ernie Janes / Common frogs (Rana temporaria) in pond, Norfolk, UK, March

Paul Harcourt Davies / Common / Lesser duckweed (Lemna minor) on pond water, Italy

Wild Wonders of Europe / della Ferrera / Common duckweed (Lemna minor) covering a water channel at dusk, riparian forest mainly consisting of Willow trees (Salix sp) Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavi...

Robert Thompson / Common frog {Rana temporaria} in water amongst Duckweed, Brackagh Moss NNR, Portadown, County Down, Northern Ireland, March

Oriol Alamany / Iberian Green / Western Marsh Frog (Rana perezi) in pond with Common / Lesser Duckweed (Lemna minor), Ebro Delta Natural Park, Catalonia, Spain, September, Captive

Philippe Clement / Juvenile Common european toad (Bufo bufo) on lily pad, Belgium, captive