Frog, any of different tailless creatures of land and water having a place with the request Anura. Utilized carefully, the term might be restricted to any individual from the family Ranidae (genuine frogs), however more extensively the name frog is regularly used to recognize the smooth-cleaned, jumping anurans from squat, warty, bouncing ones, which are called amphibians.
By and large, frogs have projecting eyes, no tail, and solid, webbed rear feet that are adjusted for jumping and swimming. They likewise have smooth, clammy skins. Many are prevalently sea-going, yet some live ashore, in tunnels, or in trees. A number withdraw from the common structure. Sedge frogs (Hyperolius), for instance, are climbing African frogs with glue toe circles. The flying frogs (Rhacophorus) are tree-abiding, Old World rhacophorids; they can skim 12 to 15 meters (40 to 50 feet) by methods for extended webbing between the fingers and toes (see tree frog).
The nose vent length of frogs ranges from 9.8 mm (0.4 inch) in the Brazilian Psyllophryne didactyla to 30 cm (12 inches) in the West African Conraua goliath. The male anuran is commonly littler than the female.
Albeit numerous frogs have toxic skin organs, these poisons don't ordinarily give security from ruthless well evolved creatures, fowls, and snakes. Palatable anurans depend on cover; some mix with their experiences, while others change hues. A few animal varieties have splendid hues on their underparts that glimmer when the frog moves, conceivably befuddling adversaries or filling in as a notice of the frog's harmfulness. Most frogs eat bugs, other little arthropods, or worms (see video), yet various them likewise eat different frogs, rodents, and reptiles.
The yearly reproducing of frogs typically happens in new water. In the sexual grasp (amplexus), the male catches the female from behind and expels sperm over the eggs as they are launched out by the female. The eggs, laid in numbers shifting from a couple of hundred to a few thousand (contingent upon the species), at that point buoy off in groups, strings, or sheets and may wind up connected to the stems of water plants; the eggs of certain species sink. The tadpole brings forth in a couple of days to possibly more than seven days and transforms into a frog inside two months to three years. During transformation the lungs create, appendages show up, the tail is retained, and the mouth turns out to be ordinarily froglike. In some tropical frogs, the eggs are stored ashore and the youthful bring forth as froglets, instead of tadpoles.