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More About Frogs ...
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A frog is a fresh-water amphibian of the family Ranidae, in the Order Anura. They are closely related to toads. The Ranidae are sometimes called the "true frogs" since a few members of other families also have common names including the word "frog.".
In many parts of the world the frog population has declined drastically over the last few decades. Pollutants are one cause for this decline but other culprits include climatic changes, parasitic infestation, introduction of non-indigenous predators/competitors, infectious diseases, and urban encroachment.
The life cycle of a frog involves several stages. A female frog lays her eggs in a shallow pond or creek, where they will be sheltered from the current and from predators. The eggs, known as frogspawn hatch into tadpoles. The tadpole stage develops gradually into an adolescent froglet, resembling an adult but retaining a vestigial tail. Finally the froglet develops into an adult frog. Typically, tadpoles are herbivores, feeding mostly on algae, whereas juvenile and adult frogs are rather voracious carnivores. Furthermore, The red-legged frogs normally reproduce from November to early April because during these months, the water is about six or seven degrees Celsius. Under these cool conditions, embryonic survival is ensured. Amplexus is the process wherein the male grasps the female while she lays her eggs. At the same time, he fertilizes them with a fluid containing sperm. The eggs are about 2.0 to 2.8 millimetres in diameter and are dark brown. After about six to fourteen days, the eggs hatch between July and September into brown tadpoles that are about three inches long. The tadpoles then progress to lose their tails, grow legs, and change into a juvenile form with adult characteristics.
Frogs eat insects such as mosquitoes and small animals such as minnows. Their sticky tongues are effective in catching fast-moving preys. They hunt mostly at night.
Frogs are a diverse group with some 4800 species. Most spend their lives in or near a source of water (water frogs), although tree frogs live in moist environments that are not actually aquatic. The requirement for water becomes most acute for egg and tadpole stages of the frog, yet here again some species are able to utilize temporary pools and water collected in the axils of plants.
The most familiar frogs are the Bullfrog, the Edible frog, the Leopard frogs, Spring Peepers, and the Green Frogs.
Frogs range in size from less than 50mm to 300mm in Conraua goliath, which is the largest known frog. All frogs have horizontal pupils, smooth skin and long legs with webbing between their toes. This family has a bicornuated tongue that is attached in front: They also have a tympanum on each side of their head, which is involved in sound production. Most frogs have deep, booming calls, or croaks, with some being onomatopoeically represented by the word "ribbet" or "ribbit."
Many species of frog secrete toxins from their skin when under threat. These toxins deter predatory animals from eating them, and some are extremely poisonous to humans. The natives of the Amazon area extract curare from the poison arrow frog.
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Taxonmony
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Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Ranidae
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Source: Wikipedia Read more about Frogs
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AUDIO CLIPS
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Spotted Marsh Frog
0.050MB AU Hear Sound
Tasmania - Dept. of Primary Industries, Water, and Environment
The call, which can be heard in spring and summer, has been likened to two stones being tapped together, 'ick-ick'
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Striped Marsh Frog
0.050MB AU Hear Sound
Tasmania - Dept. of Primary Industries, Water, and Environment
During spring and summer, males call from either the water or concealed sites, such as under leaf litter. The call is a soft, explosive 'whuck'.
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Tasmanian Froglet
0.040MB AU Hear Sound
Tasmania - Dept. of Primary Industries, Water, and Environment
The call of this species is an unusual lamb-like bleating, 'baa-aa-aa' mainly heard in the spring and summer.
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Tasmanian Tree Frog
0.030MB AU Hear Sound
Tasmania - Dept. of Primary Industries, Water, and Environment
During the spring and summer it calls with a distinctive duck-like 'quank-quank-quank'.
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Common Frog
Streaming RAM Hear Sound
Wildsong
Single male frog call
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Frog
0.480MB MP3 Hear Sound
U.S. Fish and Wildlife Service
Frogs (various)
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Frog
0.510MB MP3 Hear Sound
U.S. Fish and Wildlife Service
Frogs (peepers)
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Frog
0.480MB MP3 Hear Sound
U.S. Fish and Wildlife Service
Frogs (various)
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Frog
0.380MB MP3 Hear Sound
U.S. Fish and Wildlife Service
Frog in rain
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Tree Frog
1.000MB MP3 Hear Sound
EarthEar
After a late afternoon rain, the dominant voices of primates and birds are stilled, and the calls of a deep forest treefrog (Hyla albofrenata) is heard calling from leaves, branches, and even bromeliad tubes above the forest floor.. See details in the page below to buy the CD
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Tree Frog
0.140MB MP3 Hear Sound
Club voor Natuurgeluiden Registratie
Tree Frog
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Brown Frog
0.220MB MP3 Hear Sound
Club voor Natuurgeluiden Registratie
Brown Frog
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Frog
0.360MB MP3 Hear Sound
Club voor Natuurgeluiden Registratie
Frog
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Frog
0.240MB MP3 Hear Sound
Club voor Natuurgeluiden Registratie
Moorland with Frogs
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Bull Frog
0.000MB WAV Hear Sound
Fish and Wildlife, South Willamette District
Bull Frog call
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Whistling frog
0.750MB WAV Hear Sound
Department of Conservation, New Zealand
Whistling frog call
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Southern Bell frog
0.800MB WAV Hear Sound
Department of Conservation, New Zealand
Southern Bell frog call
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Green and Golden Bell frog
0.520MB WAV Hear Sound
Department of Conservation, New Zealand
Green and Golden Bell frog call
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frog
0.020MB WAV Hear Sound
e-Vet
frog sound
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Bullfrog
0.010MB WAV Hear Sound
e-Vet
Bullfrog sound
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frog
0.010MB WAV Hear Sound
e-Vet
frog sound
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Bull Frog
0.040MB WAV Hear Sound
Toronto Zoo
Audio of Bull Frog
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Blanchard's Cricket Frog
0.050MB WAV Hear Sound
Toronto Zoo
Audio of Blanchard's Cricket Frog
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Boreal Chorus Frog
0.050MB WAV Hear Sound
Toronto Zoo
Audio of Boreal Chorus Frog
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Striped Chorus Frog
0.050MB WAV Hear Sound
Toronto Zoo
Audio of Striped Chorus Frog
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Gray Treefrog
0.070MB WAV Hear Sound
Toronto Zoo
Audio of Gray Treefrog
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Spring Peeper
0.060MB WAV Hear Sound
Toronto Zoo
Audio of Spring Peeper
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Bullfrog
0.010MB WAV Hear Sound
Toronto Zoo
Audio of Bullfrog
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Mink Frog
0.080MB WAV Hear Sound
Toronto Zoo
Audio of Mink Frog
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Wood Frog
0.040MB WAV Hear Sound
Toronto Zoo
Audio of Wood Frog
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Green Frog
0.030MB WAV Hear Sound
Toronto Zoo
Audio of Green Frog
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Pickerel Frog
0.070MB WAV Hear Sound
Toronto Zoo
Audio of Pickerel Frog
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Leopard Frog
0.050MB WAV Hear Sound
Toronto Zoo
Audio of Leopard Frog
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Green Tree Frog
WAV Hear Sound
146KB WAV
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Green Tree Frog
WAV Hear Sound
212KB WAV
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Red Eyed Tree Frog
AIFF Hear Sound
310KB AIFF
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