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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.
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Diversity in diet plays a role in the complexity of venom in pit vipers such as rattlesnakes, copperheads and cottonmouths. But new collaborative research found the number of prey species a snake ate did not drive venom complexity. Rather, it was how far apart the prey species were from each other evolutionarily.
- Bearded dragon embryos become females either...on April 15, 2021 at 6:18 pm
Bearded dragon embryos can use two different sets of genes to become a female lizard -- one activated by the sex chromosomes and the other activated by high temperatures during development, researchers report.
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Some snake species slither across the ground, while others climb trees, dive through sand or glide across water. Today, scientists report that the surface chemistry of snake scales varies among species that negotiate these different terrains. The findings could have implications for designing durable materials, as well as robots that mimic snake locomotion to cross surfaces that would otherwise be impassable.
- Frog species with 6 sex chromosomes offer new...on April 13, 2021 at 12:13 pm
The O. swinhoana frog species is the first vertebrate known to retain descendant genes that now determine sex in mammals, birds, and fishes inherited from a common ancestor.
- New deadly snake from Asia named after character...on April 6, 2021 at 12:40 pm
The venomous krait that caused the death of famous herpetologist Joseph B. Slowinski turns out to be new to science, according to recent research. The new species, Bungarus suzhenae, was named after the character Bai Su Zhen from the Chinese myth the Legend of White Snake.
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.
- Frog with six sex chromosomes provides clues to...on April 13, 2021 at 11:52 am
Scientists have found six sex chromosomes in the Odorrana swinhoana frog species endemic in Taiwan, giving new insights into how complex XY systems evolve.
- New species of frog unearthed in Peruvian Amazon...on April 12, 2021 at 5:49 pm
A new species of marsupial frog has been discovered in Peru's Amazon jungle, the state service for natural protected areas said on Monday.
- New Jurassic flying reptile reveals the oldest...on April 12, 2021 at 4:49 pm
A new 160-million-year-old arboreal pterosaur species, dubbed 'Monkeydactyl', has the oldest true opposed thumb—a novel structure previously not known in pterosaurs.
- Gorillas do not bluff when they beat their...on April 8, 2021 at 3:00 pm
The gorilla chest beat is one of the most emblematic sounds in the animal kingdom. However, until recently, it was unclear what information gorillas were conveying when they gave these impressive displays. A team of international researchers show that chest beats reliably indicate the body size of the chest beater. Body size indicates competitive ability in gorillas. Therefore, this information is likely to be crucial for rival males as well as females in influencing mate choice.
- Parts of U.S.'s southernmost states will...on April 7, 2021 at 8:27 am
As climate change reduces the frequency and intensity of killing freezes, tropical plants and animals that once could survive in only a few subtropical parts of the U.S. are expanding their ranges northward, according to a new study led by the U.S. Geological Survey. This change is likely to result in some temperate zone plant and animal communities found today across the southern U.S. being replaced by tropical plant and animal communities.