A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura. The oldest fossil "proto-frog" Triadobatrachus is known from the Early Triassic of Madagascar, but molecular clock dating suggests their split from other amphibians may extend further back to the Permian, 265 million years ago. Frogs are widely distributed, ranging from the tropics to subarctic regions, but the greatest concentration of species diversity is in tropical rainforest. Frogs account for around 88% of extant amphibian species. They are also one of the five most diverse vertebrate orders. Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from taxonomy or evolutionary history.
A tadpole is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found in adult amphibians such as a lateral line, gills and swimming tails. As they undergo metamorphosis, they start to develop functional lungs for breathing air, and the diet of tadpoles changes drastically.
The American bullfrog, often simply known as the bullfrog in Canada and the United States, is a large true frog native to eastern North America. It typically inhabits large permanent water bodies such as swamps, ponds, and lakes. Bullfrogs can also be found in manmade habitats such as pools, koi ponds, canals, ditches and culverts. The bullfrog gets its name from the sound the male makes during the breeding season, which sounds similar to a bull bellowing. The bullfrog is large and is commonly eaten throughout its range, especially in the southern United States where they are plentiful.
Lithobates sylvaticus or Rana sylvatica, commonly known as the wood frog, is a frog species that has a broad distribution over North America, extending from the boreal forest of the north to the southern Appalachians, with several notable disjunct populations including lowland eastern North Carolina. The wood frog has garnered attention from biologists because of its freeze tolerance, relatively great degree of terrestrialism, interesting habitat associations, and relatively long-range movements.
Indosylvirana temporalis, commonly known as the bronzed frog or Günther's golden-backed frog, is a species of true frog found in the riparian evergreen forests of the highlands of southwestern Sri Lanka. They are found abundantly on or close to the ground near water. Individuals are not shy and react by jumping only when provoked. They are important prey of many species of snakes, including the vine snake. Some related species found in the Western Ghats of India were formerly included in this species but were separated in a 2014 study.
The bicolored frog or Malabar frog is a species of frog endemic to the Western Ghats of India. The tadpoles of the species are black and form dense and compact schools in slow moving streams in forested areas.
The foothill yellow-legged frog is a small-sized frog from the genus Rana in the family Ranidae. This species was historically found in the Coast Ranges from northern Oregon, through California, and into Baja California, Mexico as well as in the foothills of the Sierra Nevada and southern Cascade Range in California. The foothill yellow-legged frog is a Federal Species of Concern and California State Endangered. A federal rule to list four out of six extant distinct population segments (DPS) under the Endangered Species Act was proposed in December 2021.
Hoplobatrachus is a genus of frogs in the family Dicroglossidae. This genus is found in both Sub-Saharan Africa and southern and southeastern Asia. It is the sister taxon of Euphlyctis, although there is some evidence that it might be paraphyletic with respect to Euphlyctis. These frogs are sometimes known as the crowned bullfrogs or the tiger frogs.
The banded bullfrog is a species of frog in the narrow-mouthed frog family Microhylidae. Native to Southeast Asia, it is also known as the Asian painted frog, digging frog, Malaysian bullfrog, common Asian frog, and painted balloon frog. In the pet trade, it is sometimes called the chubby frog. Adults measure 5.4 to 7.5 cm and have a dark brown back with stripes that vary from copper-brown to salmon pink.
Bullfrog is a common English language term to refer to large, aggressive frogs, regardless of species.
Hoplobatrachus tigerinus, commonly known as the Indian bullfrog, is a large species of fork-tongued frog found in South and Southeast Asia. A relatively large frog, it is normally green in color, although physiological traits vary between populations. Sexual dimorphism exists between males and females. Outside of its native range, H. tigerinus is a rapidly-spreading invasive species. Both adults and tadpoles can severely damage the populations of other frog species. Typically, Indian bullfrogs dwell in wetland environments. Research has been conducted on their ability to control mosquitos.
Uperodon montanus, also known as Jerdon's narrow-mouthed frog, Jerdon's ramanella, mountain dot frog, mountain globular frog, or Malabar Hill frog, is a species of narrow-mouthed frog endemic to the Western Ghats of India.
Micrixalus saxicola is a species of frog in the family Micrixalidae, found in forest streams in the Western Ghats of India.This frog has a brown colored dorsum and a white ventral side with irregular white specks on its dark brown throat and chest. Its smooth skin and cryptic coloration allow it to blend into its surroundings while resting or calling. The males of the species are territorial, and will use calling, foot tapping, and foot flagging to warn off competition. M. saxicolais is described by the IUCN as a vulnerable species due to habitat loss, fragmentation, and human interference.The frog also threatened by infection by the fungus Batrachochytrium dendrobatidis.
Indirana leithii is a species of frog in the family Ranixalidae. It is endemic to the northern Western Ghats of India. As currently defined, its range is restricted to the states of Maharashtra and southern Gujarat; earlier records elsewhere refer to other species.
Uperodon taprobanicus, also known as the Sri Lankan bullfrog, Sri Lankan painted frog, Sri Lankan kaloula, Ceylon kaloula, Indian painted frog, or painted globular frog, is a species of narrow-mouthed frog found in Nepal, Bangladesh, southern and eastern India, and Sri Lanka up to an altitude of about 1300 metres. It can grow to an adult length of up to 75 millimetres(7.5 cm) long from snout to vent. It was originally described as a subspecies of Kaloula pulchra, ssp. taprobanica. The IUCN lists it as being of "Least Concern".
Uperodon variegatus, also known as the Eluru dot frog, termite nest frog, variable ramanella, variagated ramanella, white-bellied pug snout frog, or variagated globular frog, is a species of narrow-mouthed frog that is endemic to India. Earlier records from Sri Lanka refer to what is now known as Uperodon rohani. They are seen mostly in the monsoon season when they may enter homes. They are small in size and the variegated markings and the genus characteristic of having pads on the fingertips but not on their toes make them easy to identify.
The African bullfrog, also known as the Giant bullfrog or the South African burrowing frog, is a species of frog in the family Pyxicephalidae. It is also known as the pixie frog due to its scientific name. It is found in Angola, Botswana, Kenya, Malawi, Mozambique, Namibia, South Africa, Tanzania, Uganda, Zambia, Zimbabwe, and possibly the Democratic Republic of the Congo. It has been extirpated from Eswatini. It has long been confused with the edible bullfrog, and species boundaries between them, including exact range limits, are not fully understood. Additionally, P. angusticeps of coastal East Africa only was revalidated as a separate species in 2013.
Lithobates clamitans or Rana clamitans, commonly known as the green frog, is a species of frog native to eastern North America. The two subspecies are the bronze frog and the northern green frog.
Blanchard's cricket frog is a species of frog in the family Hylidae. It is a small, dark colored frog that is threatened or endangered in Michigan, Wisconsin, and Minnesota. Studies have been done to see why the population of the frog is beginning to decrease in those states. Blanchard's cricket frogs are commonly found in wetlands, ponds, and/or near row crop agriculture. The average life span for this frog is about one year, which is why the species is considered to be short-lived. Little is known about the interactions and basic ecology, even though populations are decreasing. Blanchard's cricket frog was formerly considered to be a subspecies of the northern cricket frog.
