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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.
Cytoplasm of scrambled frog eggs organizes into...
on November 6, 2019 at 7:49 pm
The cytoplasm of ruptured Xenopus frog eggs spontaneously reorganizes into cell-like compartments, according to a study.
Why did the turtles cross the highway? They...
on November 6, 2019 at 4:42 pm
Researchers set out to determine the impact of the Route 33 bypass through Wayne National Forest on the local box turtle population. The answers were not exactly what they expected.
Ancient bone protein reveals which turtles were...
on November 4, 2019 at 7:16 pm
Thousands of years ago, the inhabitants of modern-day Florida and the Caribbean feasted on sea turtles, leaving behind bones that tell tales of ancient diets and the ocean's past. An international team of scientists used cutting-edge technology to analyze proteins from these bones to help identify which turtle species people fished from the ocean, helping inform conservation efforts today.
New ranavirus threatens US amphibian diversity
on November 1, 2019 at 12:20 pm
Biologists modeled how a chimeric Frog virus 3 (FV3)-like ranavirus, also known as RCV-Z2, could spread rapidly throughout a population of North American wood frog (Lithobates sylvaticus) tadpoles.
Zoo animal research skewed towards 'popular'...
on October 31, 2019 at 3:25 pm
Research on zoo animals focuses more on 'familiar' species like gorillas and chimpanzees than less well known ones like the waxy monkey frog, scientists say.
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.
Researchers explore how citizens can become...
on November 14, 2019 at 8:51 pm
If you like to walk in the woods, raft a river, dig in a garden or look at butterflies, you could become an agent of change.
Frogs' mating calls also attract predators
on November 12, 2019 at 1:23 pm
Frogs have been struggling a bit in recent years. Their populations around the world have been declining for decades, and the reasons for their loss come from many fronts. Like many other animals, frogs are losing their homes and learning to live in a changing world.
New VR game to help researchers understand...
on November 7, 2019 at 2:22 pm
Researchers have developed a free virtual reality game which allows players to experience the thrill of the hunt as a hungry predator feasting on swarming flies.
Bringing the world's buried wetlands back from...
on November 5, 2019 at 8:06 am
The ghosts are all around the gently rolling farmlands of eastern England. But you have to know where to look.
U.S. founding fathers were obsessed with American...
on November 4, 2019 at 2:16 pm
Around the time of the Revolutionary War, the Americans faced a threat beyond the British: the ideas of French naturalist Georges-Louis Leclerc, Comte de Buffon, the world's leading intellectual at the time and author of the authoritative "Histoire naturelle."