John Cancalosi / American bullfrog (Lithobates catesbeianus) next to Water lily flower, Washington DC, USA, July.

John Cancalosi / American bullfrog (Lithobates catesbeianus) swimming near Water lilies (Nymphaea sp) Washington DC, USA. July.

Lynn M Stone / Bullfrog (Rana catesbeiana) with head sticking out above water in pond, Deep River, Connecticut, USA, July

Tony Heald / African bullfrogs {Pyxicephalus adspersus} group of males in water, Etosha NP, Namibia, January

Tony Heald / African bullfrog {Pyxicephalus adspersus} vanquished male leaps away from fight, Etosha NP, Namibia, January

Jabruson / African bullfrog {Pyxicephalus flavigula} Tsavo East NP, Kenya

Rolf Nussbaumer / Close-up of a Bullfrog eye {Rana catesbeiana} with head camouflaged in duckweed, Welder Wildlife Refuge, Sinton, Texas, USA.

Rolf Nussbaumer / RF- Bullfrog (Rana catesbeiana) adult on American lotus lilypad. Welder Wildlife Refuge, Sinton, Texas, USA. (This image may be licensed either as rights managed or royalty free.)

Jabruson / Bullfrog eating mouse {Pyxicepalus flavigula} Tsavo East NP, Kenya

Jabruson / African bullfrog {Pyxicephalus flavigula} eating mouse. Tsavo East NP, Kenya

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...

Doug Wechsler / Bullfrog male in garden pond {Rana catesbeiana} Pennsylvania, USA.

Doug Wechsler / Bullfrog female by garden pond {Rana catesbeiana} Pennsylvania, USA

Doug Wechsler / Bullfrog (Lithobates catesbeianus) eating Periodical cicada (Magicicada sp.), Bucks County, Pennsylvania, USA. June 2021

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) standing next to pond, Botswana, Southern Africa.

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) partially submerged in pond, Botswana, Southern Africa.

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) sitting at waters edge in pond, Botswana, Southern Africa.

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) emerging from pond, Botswana, Southern Africa.

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) sitting at edge of pond, Southern Africa.

Klein & Hubert / African bullfrog (Pyxicephalus adspersus) partially submerged in pond, Southern Africa.

Chris Mattison / Amazon horned frog (Ceratophrys cornuta) close up, Brazil, South America

Chris Mattison / Asian bullfrog / Chubby frog (Kaloula pulchra) sitting on wet, mossy ground.

Chris Mattison / Asian bullfrog / Chubby frog (Kaloula pulchra) sitting on wet. mossy ground.

Chris Mattison / Asian bullfrog / Chubby frog (Kaloula pulchra) sitting on wet, mossy ground.

Chris Mattison / South African dwarf bullfrog (Pyxicephalus edulis) sitting in water, South Africa.

Chris Mattison / Western banjo frog (Limnodynastes dorsalis) sitting on dried leaves, Walpole, Western Australia

Robert Valentic / Giant banjo frog (Limnodynastes interioris) female, from the western slopes of the Great Dividing Range near Albury, southern New South Wales, Australia. Controlled conditions.

Mark Taylor / RF - African bullfrog (Pyxicephalus adspersus), walking. Captive, occurs in AFrica. (This image may be licensed either as rights managed or royalty free.)

Mark Taylor / RF - African bullfrog (Pyxicephalus adspersus), mouth open. Captive, occurs in Africa. (This image may be licensed either as rights managed or royalty free.)

Mark Taylor / African bullfrog (Pyxicephalus adspersus), occurs in Africa.

Mark Taylor / African bullfrog (Pyxicephalus adspersus), taking a mealworm. Occurs in Africa.

Mark Taylor / African bullfrog (Pyxicephalus adspersus), walking. Captive, occurs in Africa.

Mark Taylor / African bullfrog (Pyxicephalus adspersus). Captive, occurs in Africa.

Bert Willaert / Western banjo frog (Limnodynastes dorsalis). Herdsman Lake, Perth, Western Australia. October.

Bert Willaert / Western banjo frog (Limnodynastes dorsalis) portrait. Herdsman Lake, Perth, Western Australia. October.

Robert Valentic / Asian painted frog (Kaloula pulchra) from a coastal resort garden on Phuket Island, Thailand

MYN / Lily Kumpe / Western banjo frog (Limnodynastes dorsalis) William Bay National Park, Western Australia. Meetyourneighbours.net project.

Chris & Monique Fallows / African giant bullfrog (Pyxicephalus adspersus) males calling in water, Central Kalahari Game Reserve. Botswana

Chris & Monique Fallows / African giant bullfrog (Pyxicephalus adspersus) males calling in water, Central Kalahari Game Reserve, Botswana

Nick Hawkins / Bullfrog (Rana catesbeiana) photographed on white background, New Brunswick, Canada, May.

Chris & Monique Fallows / African giant bullfrog (Pyxicephalus adspersus) female with much larger male in the background, Central Kalahari Game Reserve. Botswana.