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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]
Male Dendropsophus microcephalus calling. Sexual selection in amphibians involves sexual selection processes in amphibians, including frogs, salamanders and newts.Prolonged breeders, the majority of frog species, have breeding seasons at regular intervals where male-male competition occurs with males arriving at the waters edge first in large number and producing a wide range of vocalizations ...
Like other species in the genus Chiromantis, they have discs on their toes, and their outer two fingers are widely spaced and nearly at a right angle to their inner two fingers on each hand. The grey foam-nest tree frog typically has a snout length of 50–80 mm. Males have a snout-vent length of 43–75 mm, while females have a 60–90 mm ...
Darwin's frog is a small species with a snout–to–vent length of 2.2 to 3.1 cm (0.9 to 1.2 in). The snout is elongated into a fleshy proboscis which gives the head a triangular shape. The snout is elongated into a fleshy proboscis which gives the head a triangular shape.
European treefrog (Hyla arborea). A tree frog (or treefrog) is any species of frog that spends a major portion of its lifespan in trees, known as an arboreal state. [1] Several lineages of frogs among the Neobatrachia suborder have given rise to treefrogs, although they are not closely related to each other.
DNA analysis found the new species had between 1.6% and 2% genetic divergence from other slow frogs. The research team included Shangjing Tang, Shuo Liu and Guohua Yu. Pregnant creature — with ...
The common coquí, widely known as the coquí (Eleutherodactylus coqui), is a species of frog native to Puerto Rico belonging to the family Eleutherodactylidae.The species is named for the loud call the males make at night, which serves two purposes; the "co" serves to repel other males and establish territory while the "quí" serves to attract females. [2]
Females are usually 30–36 mm, while males most often range from 24 to 32 mm, [5] although the smallest calling males can be as small as 20 mm. [6] Although the difference in size between males and females is not significant enough to constitute dimorphism, there is an unusually large variation in size of males in this species, which may be attributed to pressures of sexual selection. [10]