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The decline in amphibian and reptile populations has led to an awareness of the effects of pesticides on reptiles and amphibians. [177] In the past, the argument that amphibians or reptiles were more susceptible to any chemical contamination than any land aquatic vertebrate was not supported by research until recently. [ 177 ]
Male common midwife toad (Alytes obstetricans) with eggs Pouched frog (Assa darlingtoni) Although care of offspring is poorly understood in frogs, up to an estimated 20% of amphibian species may care for their young in some way. [173] The evolution of parental care in frogs is driven primarily by the size of the water body in which they breed.
These studies revealed the bullfrog's diet to be unique among North American ranids in the inclusion of a large percentage of aquatic animals, such as fish, tadpoles, ram's horn snails, and dytiscid beetles, as well as the aquatic eggs of fish, frogs, insects, or salamanders. [47]
A similar pattern can be seen in modern amphibians. Frogs that have evolved terrestrial reproduction and direct development have both smaller adults and fewer and larger eggs compared to their relatives that still reproduce in water. [24]
A list of amphibians organizes the class of amphibian by family and subfamilies and mentions the number of species in each of them. The list below largely follows Darrel Frost 's Amphibian Species of the World ( ASW ), Version 5.5 (31 January 2011).
Genus Ascaphus - Tailed frog; Family Bombinatoridae. ... Amphibians portal; Amphibian; Herping This page was last edited on 9 March 2024, at 11:37 (UTC). ...
It belongs to a lineage believed to have given rise to the three living branches of amphibians - frogs, salamanders and limbless caecilians. Creature named for Kermit the Frog offers clues on ...
A striking parallel can be seen in the frog family Leptodactylidae, which has a very diverse reproductive system, including foam nests, non-feeding terrestrial tadpoles and direct development. The Diadectomorphans generally being large animals would have had correspondingly large eggs, unable to survive on land. [38]