Of the approximately 3,500 species of frogs, frogs and tree frogs cataloged in the world, more than 600 occur in Brazil. According to body shape, animals classified as amphibians are ordered as follows.
The cecilia are amphibian, vermiform, limbless and buried. As a result, their eyes are very small and use chemical receptors to detect their prey. They may be aquatic or terrestrial, but all breathe through the lungs.
They feed on elongated prey such as worms, worms, insect larvae and probably also small fish. Cecilia are found in tropical regions. In Brazil there are aquatic species in the Amazon and terrestrial throughout most of the territory. They are difficult to find because they live in damp places buried in the soil.
Males in this group have a reproductive organ called the failed, so the fecundation in the Cecilia is internal. Some species of cecilia are oviparous and other viviparous, in the case of oviparous females take care of eggs until birth.
Anurans are a group of non-tailed amphibians that have a skeleton structure adapted for jumping locomotion. The diversity of anurans is huge and this group is present on all continents. There are anurans adapted to aquatic and terrestrial life. All are carnivores, usually use vision to detect prey, so movement is important. These animals have a wide variety of reproductive strategies, ranging from the direct development of tadpoles, born after ten days, and which after a series of metamorphoses turn into thrush.
The frog catches its prey with its agile tongue. He closes his eyes to swallow the food. Attitude that is a physiological necessity: The large eyes are forced into the oral cavity and thus help to push the food down the throat. Frogs are very useful to man because with their great appetite they eat many worms, caterpillars and harmful insects of various species. The most fascinating part of anuran reproduction however is the vocalization of the male to attract the female. Each species produces a different sound giving rise to a wide variety of sounds. They can also make sounds of agony and of defense of territory.
Frogs are popularly known as frogs. They are very water related and good swimmers. In Brazil, only one true frog species is found in the Amazon. Its hind limbs are long and adapted to swimming and jumping. "True" frogs have membranes between the toes of the hind limbs (as in a duck's foot). They feed on snails, slugs and insects by catching them with their tongue. Mating lasts 24 hours. The female lays 2,000 or 3,000 eggs about 2 mm in diameter. Frog meat is greatly appreciated. There are breeding grounds for commercial exploitation.
The tree frog belongs to the family of Racoforids. There are about 150 species. Its skin is smoother than those of frogs. The frog has at the ends of each finger small adhesive pads that serve to attach to the branches. It is endowed with elastic membranes extended between the fingers, which form a kind of kite. By bending the chest and extending the legs, tree frogs can fly almost six feet. When they lay their eggs, they pick a tree that hangs over the swamp, the eggs that are deposited in the leaves, and they are surrounded by a sticky substance, much like clear whipped snow. When tadpoles are born, they manufacture a substance that frees them from this sticky mass and then falls into the swamp and only then begins their aquatic life. Tree frogs are commonly found in farmhouse bathrooms and farms.
Common salamanders are called by the scientific name of Salamander salamander terrestris. They inhabit wooded regions. They live mainly in Europe and North Africa and have essentially nocturnal habits. Usually they hibernate. They became known by this name because, in the past, firewood was widely used by man as a source of heat. They differ in size and color set from the back.
Some measure about 14 to 20 centimeters. They secrete a poison that protects them from predators. This poison is produced by glands located at the back of the head and is very strong. A dog that tries to eat a salamander can die. Unlike other amphibians, the common salamander mates on land. The very active males run from one crevice to another looking for females. After fertilization, eggs develop within the female's genital organ.
Larvae are born from the female in a stream of water. They undergo metamorphosis, become adults, and lose their ability to live in water.