Anurans: Amphibians without tail and body adapted for jumping

What they are - biological definition

Anurans are non-tailed amphibian animals such as frogs, frogs and tree frogs. The name comes from Greek, where The means without and uros means tail.

Summary of the main characteristics of anurans:

- They have no tail.

- Body anatomy adapted for jumping. The hind legs of the frogs are longer and stronger than the front legs. This anatomical feature favors the jumps of these animals.

- Males have vocal sacs below the mouth, whose function is to emit specific (croaking) sounds to attract females during breeding periods.

- Stiff and short spine.

- The body of the anurans is short and wide.


Fertilization is external. The female lays the eggs directly in the water, in strings.


Anurans feed mainly on small invertebrate animals (aquatic and terrestrial). Mosquitoes, flies, crickets and beetles are the main insects that feed the frogs.


They live near river borders, lakes and streams. They are found on all continents except Antarctica. Most anuran species are found in equatorial and tropical zones of the planet, due to the great availability of water.

Poisonous Anurans

Some species of frogs, mainly frogs and frogs, produce toxins whose main function is to make them uninteresting to predators. These toxins have an unpleasant taste and irritate predators. In men, the poison of these frogs can have serious consequences, depending on the toxicity of the poison and the tolerance of each human being. The best thing to do is not to approach or try to catch these animals, especially those with strong colors.

Biological Curiosities:

- Frogs make up the largest group of amphibians. There are about 5,000 species of frogs.

- Some frog species have the ability to absorb oxygen and water directly through the skin, which is permeable.

Scientific classification

Kingdom: Animalia

Philo: Chordata

Class: Amphibia

Order: Anura

Scinax tree frog: Another example of anuran (amphibian without tail).