The marsh frog has a harsh mating (advertisement) call composed of 6-8 repetitions ‘bre-ke-ke-ke-ke-ke-keh’ whereas the call of the edible frog normally has 12-20 repetitions more rapidly delivered.Įdible frogs have a similar range to the pool frog. Pool frogs are small, compact, and possess white vocal sacs. Marsh frogs are warty, robust and have back legs which extend beyond the head. Triploid animals will show closer characteristics to either the pool frog or the marsh frog from which they have received an extra set of chromosomes.įemales do not have vocal sacs nor develop metatarsal tubercles.Įdible frogs are most commonly mistaken for Marsh frogs (Pelophylax ridibundus) and Pool frogs (Pelophylax lessonae). In order to reproduce they must backcross with one of the parent species. ![]() Dorsal surface commonly green (but may become increasingly bronze towards posterior end) and scattered with black spots.Įdible frogs have a complex hybridogenetic form of reproduction and can exist in diploid and triploid forms. Ventral surface usually white, light grey or dark grey with darker spots. Variable in colouration but typically marbled on backs of thighs yellow/orange and brown/black. It has a sharp snout and light grey vocal sacs on each side of the mouth heel of hind legs reach between the eye and the nares metatarsal tubercle is large, nearly half as long as the first toe. Rarely present in pure populations usually present as a mixed population with either pool frogs or marsh frogs.ĭiploid forms of this fairly large frog can be up to 12cms long. Introduced in 19th and 20th Centuries to a few UK sites - small increase in range from sites of introduction. This very aquatic species will inhabit all types of water bodies where pool frogs and marsh frogs are found (ponds, lakes, streams, ditches and canals). Often has a dorsal stripe, is rarely warty and has longer legs than the pool frog. Very variable in appearance and many morphological characteristics are midway between those of both parent species. The hybrid edible frog is a cross between the marsh frog and the pool frog. The Edible frog is an introduced hybrid within the United Kingdom. Females are between 5 to 9 cm long, males between 6 to 11 cm ( wikipedia ) Habitat: It is used for food, particularly in France for the delicacy frog legs. esculentus) is a name for a common European frog, also known as the common water frog or green frog (however, this latter term is also used for the North American species Lithobates clamitans). ![]() ![]() The hybrid populations are propagated by female edible frogs mating with males of one of the parental species-The Edible Frog (Pelophylax kl. However, when edible frogs mate with each other, their offspring are often misformed, so there are no pure populations of edible frogs. These populations diverged, but remained genetically close enough to be able to create fertile hybrids. During the ice ages] the population of the common ancestor of both species was split into two. Pelophylax esculentus is the fertile hybrid of the Pool Frog (Pelophylax lessonae) and the Marsh Frog (Pelophylax ridibundus), hence the addition of the "kl." (for klepton or synklepton) in the species name.
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