Related topics: species

New method to thaw frozen frog sperm produces better swimmers

Scientists have uncovered a superior method of freezing and thawing frog sperm leading to improved sperm quality. Driven by mass declines of frogs worldwide, research into cryopreservation of amphibian sperm has expanded ...

The true impact of the Black Summer fires on frogs

The first extensive survey of amphibian communities since the 2019–20 Australian Black Summer bushfires has revealed the true impact of severe fire on frogs in eastern NSW.

Warmer climate could cause Puerto Rico's frogs to croak

The coqui frog is one of Puerto Rico's most iconic animals. It gets its name from its distinctive two-note call, "co-qui," which can be heard throughout the island every night. The males of the species produce these calls ...

Uncovering the secrets of how chromosomes assemble

Experiments using extracts from African clawed frog eggs have revealed how a key protein complex is regulated to assemble chromosomes during cell division. This finding could help to shed light on the development of certain ...

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Archaeobatrachia Mesobatrachia Neobatrachia - List of Anuran families

Frogs are amphibians in the order Anura (meaning "tail-less", from Greek an-, without + oura, tail), formerly referred to as Salientia (Latin saltare, to jump). The name frog derives from Old English frogga, (compare Old Norse frauki, German Frosch, older Dutch spelling kikvorsch), cognate with Sanskrit plava (frog), probably deriving from Proto-Indo-European praw = "to jump".

Most frogs are characterized by long hind legs, a short body, webbed digits (fingers or toes), protruding eyes and the absence of a tail. Most frogs have a semi-aquatic lifestyle, but move easily on land by jumping or climbing. They typically lay their eggs in puddles, ponds or lakes, and their larvae, called tadpoles, have gills and develop in water. Adult frogs follow a carnivorous diet, mostly of arthropods, annelids and gastropods. Frogs are most noticeable by their call, which can be widely heard during the night or day, mainly in their mating season.

The distribution of frogs ranges from tropic to subarctic regions, but most species are found in tropical rainforests. Consisting of more than 5,000 species described, they are among the most diverse groups of vertebrates. However, populations of certain frog species are declining significantly.

A distinction is often made between frogs and toads on the basis of their appearance, caused by the convergent adaptation among so-called toads to dry environments; however, this distinction has no taxonomic basis. The only family exclusively given the common name "toad" is Bufonidae, but many species from other families are also called "toads," and the species within the toad genus Atelopus are referred to as "harlequin frogs".

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