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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.
- Spitting Cobra venom reveals how evolution often...on January 21, 2021 at 8:09 pm
A study of spitting cobras reveals how a combination of venom components have evolved to create an instantly painful venom, not once, but on three separate occasions.
- Exploration of toxic Tiger Rattlesnake venom...on January 20, 2021 at 12:43 am
A team of researchers has decoded the genome of the Tiger Rattlesnake, which has venom 40 times more toxic than that of Eastern Diamondback Rattlesnakes, the largest venomous snake in North America.
- Glass frogs living near roaring waterfalls wave...on January 15, 2021 at 8:53 pm
A conservationist has discovered that the glass frog Sachatamia orejuela can be added to the list of species that make use of visual cues in response to their acoustic environments. This is the first time a member of the glass frog family (Centrolenidae) has been observed using visual communication in this manner.
- Snakes evolve a magnetic way to be resistant to...on January 15, 2021 at 2:13 pm
Certain snakes have evolved a unique genetic trick to avoid being eaten by venomous snakes, according to new research. The technique works in a manner similar to the way two sides of a magnet repel each other.
- Penned release of green geckos has potential to...on January 14, 2021 at 2:58 pm
Researchers outlined how they translocated 19 barking geckos to Mana Island, using the method of penned release - enclosing them in a 100m² pen for three months so they get used to the site and hopefully establish a breeding population.
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.
- 5 ways to improve theplan to protect Australia's...on January 21, 2021 at 2:30 pm
Australia's Threatened Species Strategy—a five-year plan for protecting our imperiled species and ecosystems—fizzled to an end last year. A new 10-year plan is being developed to take its place, likely from March.
- Researchers discover the earliest supermassive...on January 19, 2021 at 5:49 pm
Nearly every galaxy hosts a monster at its center—a supermassive black hole millions to billions times the size of the Sun. While there's still much to learn about these objects, many scientists believe they are crucial to the formation and structure of galaxies. What's more, some of these black holes are particularly active, whipping up stars, dust and gas into glowing accretion disks emitting powerful radiation into the cosmos as they consume matter around them. These quasars are some of […]
- Glass frogs living near roaring waterfalls wave...on January 15, 2021 at 2:23 pm
Most frogs emit a characteristic croak to attract the attention of a potential mate. But a few frog species that call near loud streams—where the noise may obscure those crucial love songs—add to their calls by visually showing off with the flap of a hand, a wave of a foot or a bob of the head. Frogs who "dance" near rushing streams have been documented in the rainforests of India, Borneo, Brazil and, now, Ecuador.
- Evidence of huntsman spider creating leaf trap...on January 11, 2021 at 4:34 pm
A team of researchers from the Centre of the SAVA Region and the University of Antananarivo, both in Madagascar, and one from the University of Goettingen in Germany, has found evidence of a huntsman spider living in a northeastern part of Madagascar creating a trap for tree frogs. In their paper published in the journal Ecology and Evolution, the group describes their observation of a huntsman spider pulling a dead frog into what appeared to be a custom-made leaf trap.
- Clicks, bonks and dripping taps: listen to the...on December 29, 2020 at 11:08 am
Frog calls are iconic sounds of summer in Australia. There are more than 240 species native to Australia, almost all of which are found nowhere else on Earth.