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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.
- Modern snakes evolved from a few survivors of...on September 14, 2021 at 3:12 pm
A new study suggests that all living snakes evolved from a handful of species that survived the giant asteroid impact that wiped out the dinosaurs and most other living things at the end of the Cretaceous. The authors say that this devastating extinction event was a form of 'creative destruction' that allowed snakes to diversify into new niches, previously filled by their competitors.
- Blue-tongue vs red-bellied black: An Australian...on September 7, 2021 at 3:06 pm
Scientists have discovered that the humble blue-tongue lizard is largely resistant to the venom of the deadly red-bellied black snake, while giant carnivorous monitor lizards which feed on Australia's most venomous snakes are not.
- New beautiful, dragon-like species of lizard...on August 30, 2021 at 2:00 pm
Enyalioides feiruzae is a colourful, highly variable new species of lizard discovered in the upper basin of the Huallaga River in central Peru. The authors, having searched for amphibians and reptiles in the area between 2011 and 2018, have now finally described this stunning reptile as new to science.
- New fossil species represents ancient forerunner...on August 25, 2021 at 3:36 pm
Researchers describe a new species that represents the most primitive member of lepidosaurs, Taytalura alcoberi, found in the Late Triassic deposits of Argentina. Taytalura is the first three-dimensionally preserved early lepidosaur fossil that allowed scientists to infer with great confidence it's placement in the evolutionary tree of reptiles and aids in closing the gap of our knowledge of the origin and early evolution of lepidosaurs.
- Delinked? Novel insights into evolutionary link...on August 23, 2021 at 2:43 pm
When a species diverges into two separate species, the closely resembling but non-identical copies of the ancestral gene present in the new species are called 'orthologous' genes. Orthologous genes provide important clues to the genetic evolution of species. Recently, by analyzing certain protein-coding genes that were earlier considered orthologous among frogs and mammals, a team of researchers has unraveled fresh details of vertebrate evolution, giving new insights into the phylogenetic tree.
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.
- How urban soundscapes affect humans and wildlife,...on September 10, 2021 at 1:05 pm
The dull roar of traffic, the barking of dogs in backyards and the screeching of cockatoos at dusk. The shattering of early morning quiet by the first plane overhead or the garbage truck on its rounds. The squealed delights and occasional fights of a children's playground.
- Using frog foam as an antiseptic delivery systemon September 8, 2021 at 3:30 pm
A team of researchers affiliated with several institutions in the U.K. has found that the foam produced by a certain kind of frog can be used as an antiseptic delivery system. In their paper published in the journal Royal Society Open Science, the group describes their study of the foam and the many ways they tested its usefulness.
- California builds a 'Noah's Ark' to protect...on August 27, 2021 at 3:48 pm
It was just before sunrise in July when the botanists Naomi Fraga and Maria Jesus threw on backpacks and crunched their way across a brittle alkaline flat in the hottest corner of the Mojave Desert. Their mission: to rescue a tiny plant teetering on the brink of extinction.
- Plant roots and animals embryos rely on the same...on August 26, 2021 at 6:00 pm
What do frog eggs have in common with anti-aging creams? Their success depends on a group of chemical compounds called retinoids, which are capable of generating and re-generating tissues.
- Researcher helps collect key data to establish...on August 24, 2021 at 7:49 pm
Florida International University (FIU) researcher Alessandro Catenazzi has helped gather the critical information needed to expedite the establishment of nine new protected areas in one of the most biologically diverse regions of Peru.