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One study found that Cyclopoida made up 67%, Diptera larvae 7.3%, and Heteroptera 6.3% of prey. The skin fragments that were found in their stomach are an indication that these frogs commit cannibalism or eat their own skin which is common among amphibians.
Bullfrog stomachs have been found to contain rodents, small lizards and snakes, other frogs and toads, other amphibians, crayfish, other crustaceans, [47] small birds, scorpions, tarantulas and bats, [48] [49] as well as the many types of invertebrates, such as snails, worms and insects, which are the usual food of ranid frogs. [50]
For example, in a single family, Megophryidae, length of late-stage tadpoles varies between 3.3 centimetres (1.3 in) and 10.6 centimetres (4.2 in). [6] The tadpoles of the paradoxical frog ( Pseudis paradoxa ) can reach up to 27 centimetres (11 in), [ 7 ] the longest of any frog, [ 8 ] before shrinking to a mere snout-to-vent length of 3.4–7. ...
In one experiment, when offered live fruit flies (Drosophila virilis), salamanders chose the larger of 1 vs 2 and 2 vs 3. Frogs can distinguish between low numbers (1 vs 2, 2 vs 3, but not 3 vs 4) and large numbers (3 vs 6, 4 vs 8, but not 4 vs 6) of prey.
African clawed frogs are fully aquatic and will rarely leave the water except to migrate to new water bodies during droughts or other disturbances. Clawed frogs have powerful legs that help them move quickly both underwater and on land. Feral clawed frogs in South Wales have been found to travel up to 2 kilometres (1.2 mi) between locations. [11]
Most female frogs had around 40 ripe eggs, almost double that of the number of juveniles ever found in the stomach (21–26). This means one of two things, that the female fails to swallow all the eggs or the first few eggs to be swallowed are digested.
The African bullfrog males call out during the rainy season. The call lasts about a second and can be described as a low-pitched whoop. [16] Males have two breeding strategies, depending on their age. Young males congregate in a small area, perhaps only 1–2 m 2 (11–22 sq ft) of shallow water.
The edible bullfrog is a large bodied frog in which the males typically reach 8.3–12 cm (3.3–4.7 in) in snout–to–vent length and the females 8.5–11 cm (3.3–4.3 in). [3] Exceptionally large males may even reach 13.8 cm (5.4 in), although the species does not approach the sizes attained by the related African bullfrog (P. adspersus). [4]