Pacman Frog

There are eight species: {| class="wikitable" |- ! Image !! Scientific name!! Common name !! Distribution |- ||| Ceratophrys aurita (Raddi, 1823)||Brazilian horned frog or Wied's frog || Brazil. |- ||| Ceratophrys calcarata Boulenger, 1890||Colombian horned frog || Colombia and Venezuela |- ||| Ceratophrys cornuta (Linnaeus, 1758)||Surinam horned frog || northern part of South America |- ||| Ceratophrys cranwelli Barrio, 1980||Cranwell's horned frog || Gran Chaco region of Argentina, Bolivia, Paraguay and Brazil. |- ||| Ceratophrys joazeirensis Mercadal de Barrio, 1986|| Joazeiro horned frog || Brazil. |- ||| Ceratophrys ornata (Bell, 1843)||Argentine horned frog|| Argentina, Uruguay and Brazil. |- | || Ceratophrys stolzmanni Steindachner, 1882||Stolzmann's horned frog || Ecuador and Peru |- ||| Ceratophrys testudo Andersson, 1945|| Ecuador horned frog || Ecuador. |- |}

They have green and brown dorsal coloration. The female frog will typically not "chirp" or "croak" as often as males, but does sometimes. Males frequently have spotted chests, and at about a year old the males develop spots on their "pads" or "fingers". Males will also sometimes have subtle pads on their front legs during mating season, as well as making a sound similar to a cicada to call to their mates. The female frog is also generally larger than the male frog.

The genus name Ceratophrys derives from Greek *κέρας* (kéras), meaning “horn”, and *-φρύς* (-phrys), meaning “brow” or “eyebrow”, in reference to the horn-like projections above the eyes of adult frogs. The common name “horned frog” reflects this feature, while “Pac-Man frog” is a popular nickname derived from the resemblance of the videogame character Pac‑Man (1980s arcade).

In captivity, C. cranwelli and C. ornata are the most popular species, along with the "fantasy frog", a captive-produced hybrid between C. cranwelli and C. cornuta. These frogs can live in a terrarium with a floor area 8-10 times the size of the frog. They commonly cover themselves with substrate or just sit contentedly in the water.

The average lifespan of a Ceratophrys frog in the wild varies between 1 and 4 years. In captivity and as pets, depending on diet and care, they may live up to 15 years. A Pacman frog owner, for example, who offers a roomy and well-kept home, feeds their frog a balanced diet of live insects, and routinely evaluates its health should anticipate their frog to live closer to the higher end of the lifetime range.