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Tree of Life
Plant Flower, Tree
Invertebrate Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human
These are organized by a classification scheme developed exclusively for Cosma. More…
frog : any of various largely aquatic leaping anuran amphibians (such as ranids) that have slender bodies with smooth moist skin and strong long hind legs with webbed feet — Webster
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” appeared in the early Triassic of Madagascar, but molecular clock dating suggests their origins 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 rainforests. There are approximately 4,800 recorded species, accounting for over 85% of extant amphibian species. They are also one of the five most diverse vertebrate orders.
The body plan of an adult frog is generally characterized by a stout body, protruding eyes, cleft tongue, limbs folded underneath, and the absence of a tail in adults. Besides living in fresh water and on dry land, the adults of some species are adapted for living underground or in trees. The skin of the frog is glandular, with secretions ranging from distasteful to toxic. Warty species of frog tend to be called toads but the distinction between frogs and toads is based on informal naming conventions concentrating on the warts rather than taxonomy or evolutionary history; some toads are more closely related to frogs than to other toads. Frogs’ skins vary in color from well-camouflaged dappled brown, grey and green to vivid patterns of bright red or yellow and black to advertise toxicity and warn off predators.
Frogs typically lay their eggs in water. The eggs hatch into aquatic larvae called tadpoles that have tails and internal gills. They have highly specialized rasping mouth parts suitable for herbivorous, omnivorous or planktivorous diets. The life cycle is completed when they metamorphose into adults. A few species deposit eggs on land or bypass the tadpole stage. Adult frogs generally have a carnivorous diet consisting of small invertebrates, but omnivorous species exist and a few feed on fruit. Frogs are extremely efficient at converting what they eat into body mass.
They are an important food source for predators and part of the food web dynamics of many of the world’s ecosystems. The skin is semi-permeable, making them susceptible to dehydration, so they either live in moist places or have special adaptations to deal with dry habitats. Frogs produce a wide range of vocalizations, particularly in their breeding season, and exhibit many different kinds of complex behaviours to attract mates, to fend off predators and to generally survive. — Wikipedia
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Frogs and Reptiles News -- ScienceDaily Snakes, lizards, alligators, frogs and toads. From habitat information to frogs in stem cell research, you will find all the reptile and amphibian news here.
New study reveals how reptiles divided up the...
on September 30, 2020 at 12:52 pm
While dinosaurs ruled the land in the Mesozoic, the oceans were filled by predators such as crocodiles and giant lizards, but also entirely extinct groups such as ichthyosaurs and plesiosaurs. Now for the first time, researchers have modeled the changing ecologies of these great sea dragons.
Jaws of death: Paleontologist renames giant,...
on September 23, 2020 at 1:04 pm
Paleontologists describe a new genus of mosasaur, Gnathomortis stadtmani, a marine lizard that roamed the oceans of North America toward the end of the Age of Dinosaurs.
Climate change threatens Komodo dragons
on September 17, 2020 at 2:54 pm
The world's largest lizard, the Komodo dragon, could be driven to extinction by climate change unless significant measures to intervene are taken soon.
Rare pattern observed in migrating common swifts
on September 15, 2020 at 2:59 pm
Compared with other migratory birds, the common swift follows a very unusual pattern when it migrates from the breeding areas in Europe to its wintering locations south of the Sahara. This is what researchers have observed in a major eleven-year international study of the birds.
Lost frogs rediscovered with environmental DNA
on September 8, 2020 at 5:11 pm
Scientists have detected signs of a frog listed extinct and not seen since 1968, using an innovative technique to locate declining and missing species in two regions of Brazil.
Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.
Climate warming is altering animals' gut...
on September 29, 2020 at 1:45 pm
It seems like each day scientists report more dire consequences of climate change on animals and plants worldwide. Birds that are migrating later in the year can't find enough food. Plants are flowering before their insect pollinators hatch. Prey species have less stamina to escape predators. In short, climatic shifts that affect one organism are likely to trigger ripple effects that can disturb the structure and functioning of entire ecosystems.
Surviving the flames: Citizen scientists reveal...
on September 28, 2020 at 2:06 pm
New research from the Australian Museum (AM) and UNSW Sydney published today in Conservation Science and Practice reveals that many frog species in southeastern Australia have initially survived following the unprecedented bushfires in late 2019 and early 2020. By area burnt, this fire season was the largest in southeastern Australia since European occupation and as a result, it had a dramatic impact on biodiversity, including frogs.
Australians recorded frog calls on their...
on September 28, 2020 at 1:16 pm
Frogs are one of the most threatened groups of animals on Earth. At least four of Australia's 240 known frog species are extinct and 36 are nationally threatened. After last summer's bushfires, we needed rapid information to determine which frogs required our help.
Deforestation squeezes top predators in forest...
on September 25, 2020 at 1:40 pm
Streams in areas converted to oil palm have different top predators to those flowing through intact forests, affecting stream food webs.
Despite frog-killing disease, researchers...
on September 24, 2020 at 1:12 pm
Scientists have discovered a new species of rare frog that is rapidly disappearing. At the same time, they've also discovered hope.