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In amphibians there are salvary glands on the tongue, which in frogs produce what is called a two-phase viscoelastic fluid. When exposed to pressure, like when the tongue is wrapping around a prey, it becomes runny and covers the prey's body. As the pressure drops, it returns to a thick and elastic state, which gives the tongue an extra grip. [75]
The largest living amphibian is the 1.8 m (5 ft 11 in) Chinese giant salamander (Andrias davidianus) [41] but this is a great deal smaller than the largest amphibian that ever existed—the extinct 9 m (30 ft) Prionosuchus, a crocodile-like temnospondyl dating to 270 million years ago from the middle Permian of Brazil. [42]
This, coupled with the decrease in ozone layers, also exposes the amphibians and the eggs to heightened levels of UV radiation when compared to environments with deeper waters. [3] The boreal chorus frog has an interesting defense to invasive species. This species of frog has been found to have cultural learning on how to behave towards predators.
The fire-bellied toads are a group of six species of small frogs (most species typically no longer than 1.6 in or 4.1 cm) belonging to the genus Bombina.. The name "fire-bellied" is derived from the brightly colored red- or yellow-and-black patterns on the toads' ventral regions, which act as aposematic coloration, a warning to predators of the toads' reputedly foul taste.
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The Lissamphibia (from Greek λισσός (lissós, "smooth") + ἀμφίβια (amphíbia), meaning "smooth amphibians") is a group of tetrapods that includes all modern amphibians. Lissamphibians consist of three living groups: the Salientia ( frogs and their extinct relatives), the Caudata ( salamanders and their extinct relatives), and the ...
Amphibians reproduce by fertilizing eggs outside of the female's body (see frog reproduction). Of the seven amplexus modes (positions in which frogs mate), these frogs are found breeding in inguinal amplexus, where the male clasps the female in front of the female's back legs until eggs are laid, and the male fertilizes the egg mass with the ...
Scientists note that one easy way to tell this frog apart from R. malabaricus is to obeserve the elevation at which the specimen was found: R. malabaricus lives closer to sea level. [5] Reproduction takes place on vegetation overhanging marshy areas, ponds, and streams. [6] [4] The male frog's advertisement call resembles "trrr tik tik tik tik ...