The Anura is the order of animals in the class Amphibia that includes frogs and toads. Although distinctions can be made between frogs and toads, those distinctions have no scientific status.
The living Anura are typically divided into three suborders.
Suborder Archaeobatrachia - 4 families, 6 genera, 20 species; includes the tailed frog and midwife toad
Anurans range in size from 12 mm (0.5 in) to nearly 300 mm (nearly 1 ft) in length.
Anurans also have flat heads, external eardrums, bulging eyes that can rotate in almost any direction, and pupils that close down to a slit when exposed to bright light.
The tongue of anurans is attached at the front of the mouth instead of the rear and is covered with a sticky substance, making it an efficient trap for prey.
Anurans are a diverse group of amphibians, ranging in size from a few millimeters to a couple feet in length, and are found in nearly every niche on Earth.
Externally, anurans differ from caudates and caecilians by the presence of four limbs, of which the hind limbs are typically larger, and modified for leaping or climbing.
Anurans are also unique in that they are capable of vocalizing, and produce an array of sounds from squeaks to barking noises.
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