Guy Edwardes / Marsh Frog (Pelophylax ridibundus) vocalising with bokeh effect in the background, Danube Wetlands, Bulgaria

Guy Edwardes / Marsh Frog (Pelophylax ridibundus) vocalising with bokeh effect in the background, Danube Wetlands, Bulgaria

Theo Bosboom / Edible frog (Pelophylax k. esculentus) catching a common blue damselfly (Enallagma cyathigerum) with its tongue with pair mating on stem above, Hondenven, Tubbergen, The Netherlands, July.

Laurent Geslin / European edible frog (Rana esculenta) in urban park, next to pond with buildings in distance, Grenoble, France, May.

Wild Wonders of Europe / Lundgren / Pool Frog (Pelophylax lessonae) viewed from below while swimming, underwater around Crisan village, Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / Pool frog (Pelophylax lessonae) reflected in waters surface at night, Danube Delta, Romania, June.

Thomas Lazar / Green frog (Rana clamitans) in water. USA

Robert Valentic / European marsh frog (Pelophylax ridibundus) sub-adult from a small brook, Dadia Forest, NE Greece, July. Controlled conditions.

Melvin Grey / Marsh Frog (Pelophylax ridibundus) adult at edge of small, open lake in public park, hiding amongst 'blanket weed', with small fish. Kresna Area, Bulgaria

Loic Poidevin / Pool frog (Pelophylax lessonae) Green Lake of Neuchatel, Switzerland, September.

Duncan Murrell / Green and golden bell frog (Litoria aurea) introduced species to New Caledonia. Hienghene, New Caledonia.

Duncan Murrell / Green and golden bell frog (Litoria aurea) introduced species to New Caledonia. Hienghene, New Caledonia.