Mark Payne-Gill / African bullfrog / Giant bullfrog /Pixie frog (Pyxicephalus adspersus) male digs canal to rescue tadpoles from drying puddle, South-Africa. Second prize winner in this Wildlife Photographer of the Ye...
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Michael D. Kern / African Bull Frog / Pixie Frog (Pyxicephalus adsperus) captive from Southern Africa
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Thomas Marent / American Bullfrog (Rana catesbeiana), Reserva Natural Laguna de Sonso, Colombia
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Thomas Marent / American Bullfrog (Rana catesbeiana) portrait, Reserva Natural Laguna de Sonso, Colombia
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Thomas Marent / American Bullfrog (Rana catesbeiana) portrait, Reserva Natural Laguna de Sonso, Colombia
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Thomas Marent / American Bullfrog (Rana catesbeiana) portrait, Reserva Natural Laguna de Sonso, Colombia
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Thomas Marent / American Bullfrog (Rana catesbeiana), Reserva Natural Laguna de Sonso, Colombia
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Thomas Marent / American Bullfrog (Rana catesbeiana), Reserva Natural Laguna de Sonso, Colombia
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Michael & Patricia Fogden / American Bullfrog (Rana catesbeiana) in leaf litter showing tympanum, North America
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Tony Phelps / African bull frog {Pyxicephalus adspersus} in aestivation, Gauteng, South Africa
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Jim Brandenburg / American Bullfrog (Rana catesbeiana) at edge of lake, Minnesota
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ZSSD / American Bullfrog (Rana catesbeiana) albino in water, North America
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Barry Mansell / Bull frog {Rana catesbeiana} C Florida USA