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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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Red Eyed Tree Frog
AU Hear Sound
77KB AU
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White's Tree Frog
WAV Hear Sound
181KB WAV
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White's Tree Frog
WAV Hear Sound
51KB WAV
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Wood Frog
WAV Hear Sound
153KB WAV
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Southern Bull frog
AU Hear Sound
83KB AU
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Spring Peeper
WAV Hear Sound
173KB WAV
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Eastern Gray Tree frog
WAV Hear Sound
97KB WAV
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Bull Frog
WAV Hear Sound
115KB WAV
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Northern Leopard Frog
WAV Hear Sound
205KB WAV
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Southern Leopard Frog
WAV Hear Sound
143KB WAV
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Green Frog
AU Hear Sound
9KB AU
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Carpenter Frog
AU Hear Sound
69KB AU
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Puerto Rican Coqui
WAV Hear Sound
89KB WAV
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Golden Bell Frog
AIFF Hear Sound
201KB AIFF
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African Dwarf Frog
WAV Hear Sound
227KB WAV
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Frog
RM Hear Sound
"real-audio clip of "The Twelve Frogs of Christmas""
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Boreal Chorus Frog
AU Hear Sound
naturenorth
audio clip of Boreal Chorus Frog
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Cope's Gray Tree Frog
AU Hear Sound
naturenorth
audio clip of Cope's Gray Tree Frog
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Gray Tree Frog
AU Hear Sound
naturenorth
audio clip of Gray Tree Frog
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Green Frog
AU Hear Sound
naturenorth
audio clip of Green Frog
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Leopard Frog
AU Hear Sound
naturenorth
audio clip of Leopard Frog
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Mink Frog
AU Hear Sound
naturenorth
audio clip of Mink Frog
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Spring Peeper
AU Hear Sound
naturenorth
audio clip of Spring Peeper
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WoodFrog
AU Hear Sound
naturenorth
audio clip of WoodFrog
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Frog
WAV Hear Sound
Universitą degli Studi di Pavia
Frog, Bombina variegata
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Frog
AU Hear Sound
The Froggy Page
Blurp
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Frog
AU Hear Sound
The Froggy Page
Ka-blurp
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Frog
AU Hear Sound
The Froggy Page
Ribbet
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Frog
AU Hear Sound
The Froggy Page
Ribbets
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Frog
AU Hear Sound
The Froggy Page
East Texas frog croaks
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Frog
AU Hear Sound
The Froggy Page
Peep-peep
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Frog
AU Hear Sound
The Froggy Page
Lots of greedeeps
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Eastern Spadefoot
MP3 Hear Sound
Borror Laboratory of Bioacoustics
Eastern Spadefoot call
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Wood Frog
MP3 Hear Sound
Borror Laboratory of Bioacoustics
Wood Frog call
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Southern Leopard Frog
MP3 Hear Sound
Borror Laboratory of Bioacoustics
Southern Leopard Frog call
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Spring Peeper
MP3 Hear Sound
Borror Laboratory of Bioacoustics
Mountain chorus frogs & spring peepers
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