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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.
- Using snakes to monitor Fukushima radiationon July 20, 2021 at 7:07 pm
Ten years after one of the largest nuclear accidents in history spewed radioactive contamination over the landscape in Fukushima, Japan, a new study has shown that radioactive contamination in the Fukushima Exclusion Zone can be measured through its resident snakes.
- Stopping illegal trade of Australian lizardson July 13, 2021 at 1:37 pm
Australian reptiles face serious conservation threats from illegal poaching fueled by international demand and the exotic pet trade.
- Smaller turtles are nesting on Florida beacheson July 8, 2021 at 5:54 pm
A new study indicates that smaller loggerhead and green sea turtles are nesting on Florida beaches than in the past; however, researchers aren't sure why. The findings give clues to the status of the turtles, which is important to researchers who are monitoring the population health of the threatened species.
- Same dance, different species: How natural...on July 2, 2021 at 3:45 pm
A surprising study on the behavior of unrelated lizards in very different parts of the world has demonstrated how evolution can lead to different species learning the same skills. The study documents how the Anolis lizard species in the Caribbean, and the Draco lizard species in Southeast Asia, have solved the challenge of communicating with one another to defend territories and attract mates.
- Better way to study reputedly secretive toadon June 29, 2021 at 2:12 pm
New research has upended the conventional wisdom that for a century has incorrectly guided the study of a toad listed as endangered in part of its range.
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.
- Bats keep chit-chat simple in the airon July 16, 2021 at 12:10 pm
Bat conversations might be light on substance, according to researchers from the University of Cincinnati.
- Fossil rodent teeth add North American twist to...on July 15, 2021 at 4:52 pm
Two fossil teeth from a distant relative of North American gophers have scientists rethinking how some mammals reached the Caribbean Islands.
- A 'tail' of two RNA regulatory systemson July 8, 2021 at 1:54 pm
Messenger RNAs (mRNAs) are our cells' intermediaries as genes become proteins. In order for the instructions in our genes to be carried out, first their DNA sequences are copied into mRNA, and then that mRNA is used as a template bto create proteins that do the work of the cell. Early in development, eggs and embryos use mRNA supplied by the mother until the embryo starts making enough mRNA from its own genes. Usually, mRNAs are short lived, constantly being created and degraded to help […]
- During lockdown, opportunity to study zoo animal...on July 8, 2021 at 1:49 pm
While the UK was in lockdown, certain species of captive amphibians became more visible, a new study suggests.
- Biological fireworks show 300 million years in...on July 8, 2021 at 7:32 am
Five years ago, researchers at Northwestern University made international headlines when they discovered that human eggs, when fertilized by sperm, release billions of zinc ions, dubbed "zinc sparks."