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	Frog - Wikipedia, the free encyclopedia
		Frog noise tends to be spelt (for English speakers) as "crrrrk" in Britain and "ribbit" in the USA.
		The decline in frog diversity may also be to do with particular species having specialised on particular kinds of prey, such as certain kinds of earthworms that are themselves indicator species due to their close dependence on soil chemistry.
		Dead frogs are often used for dissections in high school and university anatomy classes, because their internal organs are relatively odourless and can easily be injected with coloured plastics to enhance the contrast between different organs.
	en.wikipedia.org /wiki/Frog (2098 words)

	BBC - Science & Nature - Wildfacts - Common frog, grass frog
		The common frogs’ smooth skin varies in colour from grey, olive green and yellow to various shades of brown and is covered with irregular dark blotches.
		Common frogs have brown eyes with fl horizontal pupils, and transparent inner eyelids that protect their eyes while they are underwater.
		Common frogs do not feed at all throughout the breeding season, but when they are active they will feed on any moving invertebrates of a suitable size, such as insects, snails, slugs and worms, which they catch with their long, sticky tongues.
	www.bbc.co.uk /nature/wildfacts/factfiles/483.shtml (960 words)

	Encyclopedia: Frog (Site not responding. Last check: 2007-11-03)
		Adult frogs are often used to teach students about the anatomy and physiology of vertebrates, or animals that have a backbone.
		Frogs are ectotherms (commonly referred to as cold-blooded), which means that their body temperature depends on the temperature of the surrounding environment.
		For example, many frogs that live where the winters are cold spend the winter months buried in the mud at the bottom of a pond, and desert-dwelling species may burrow under the sand during the dry season or to escape extreme heat.
	www.nationmaster.com /encyclopedia/Frog (554 words)

	frog. The Columbia Encyclopedia, Sixth Edition. 2001-05
		Frogs have no outer ears; their prominent eardrums are exposed on the sides of the head.
		Frogs capture insects and worms with their sticky, forked tongue, attached at the front of the lower jaw.
		Frogs are classified in the phylum Chordata, subphylum Vertebrata, class Amphibia.
	www.bartleby.com /65/fr/frog.html (505 words)

	Irish Animals - Common Frog
		Though not thought to be native the frog is now a very common and widespread amphibian, being found from the most low-lying to the highest places, wherever there are freshwater ponds.
		The spring-time metamorphosis of spawn to tadpole to froglet to frog is a spectacle that has instilled wonderment in count less generations of children and forms the centre-piece of many a school nature table.
		Frogs vary considerably in colour from yellow brown to green and even grey and are capable of changing their colour to suit their environment.
	www.irelandseye.com /irish/nature/animals/frog.shtm (151 words)

	Herpetology - Frequently asked frog questions
		In the Sydney region, the two most common frogs are probably the Striped Marsh Frog, Limnodynastes peronii and the Eastern Toadlet, Crinia signifera.
		Frogs also have a different colour pattern when they are tadpoles and when they are frogs.
		The changes from a tadpole to a frog occur when one set of genes (call them the tadpole genes) are turned off and a new set of genes (the frog genes) are turned on.
	www.amonline.net.au /herpetology/faq/frogs.htm (1853 words)

	European common frog found to use novel mating strategy
		The European common frog, Rana temporaria, has long been thought to have a straightforward breeding strategy -- one lucky male grabs the female and fertilizes her eggs as soon as she releases them into the water.
		The European common frog, or brown frog, is frequently seen and heard during spring and summer months east of the Ural mountains in Russia, and occurs over a large range of altitude, from sea level to about 2,600 meters (8,500 feet).
		The common frog is known throughout its range as an explosive breeder once the ice melts in spring, but what may have hampered observation of this unusual behavior is the fact that at lower elevations, breeding typically takes place at night.
	www.eurekalert.org /pub_releases/2004-09/uoc--ecf091504.php (1216 words)

	Rana temporaria - the Common Frog
		You may see paired frogs around the margins of ponds and slow-flowing rivers in March and early April, and soon afterwards the frogspawn appears in large blobs.
		Unlike the dry warty skin of a toad, the skin of a frog is smooth and has to be kept moist at all times.
		Frogs are therefore less likely to be found in wood piles and old sheds - just the sort of places you might find a toad.
	www.first-nature.com /amphibians/rana_temporaria.htm (279 words)

	The Frog Doctor (Site not responding. Last check: 2007-11-03)
		While you may not think of frogs as being particularly clean creatures, most diseases that pet frogs fall prey to are actually caused by their environment.
		Frogs get really stressed when you transport them, so your best bet is to do this as quickly as possible, with as little handling as possible.
		For example, poison frogs lose their toxicity when they are bred in captivity because their diet is no longer as diverse as it would naturally be.
	allaboutfrogs.org /info/doctor/sick.html (2213 words)

	Common Frog Species
		Frogs can be a very interesting pet to keep, and there are varieties available to please just about anyone.
		Most poison dart frogs lose their poison in captivity, but care should be taken not to allow other pets to have contact with these frogs, and hands should be washed after any contact.
		Small pieces of gravel are very easily ingested by frogs, and can become impacted in their digestive system, causing death.
	www.klsnet.com /frogs.html (916 words)

	Ladywildlife's Common Frog Page
		Habits: The common frog lives in grassy meadows and woods, on moors and marshes, along canals and rivers, and beside lakes and ponds.
		The frog hibernates from November to March either on land in a secluded spot, or underwater, hidden in the soft mud.
		Man is a predator of the common frog: large numbers are caught every year for use in school and research laboratories.
	ladywildlife.com /animal/commonfrog.html (811 words)

	Common Frog - Rana temporaria
		Common Frogs often breed in the same water as the Common Toad (Bufo bufo) and may be confused with them.
		Frogs are most likely to be seen during the breeding season, though sub adults may frequent garden ponds throughout the summer months.
		Adult frogs will range far from their breeding ponds and may be found almost anywhere at this time, from open fields to the more expected damp areas close to standing water.
	www.herpetofauna.co.uk /common_frog.htm (451 words)

	Animal Planet :: Corwin's Carnival of Creatures (Site not responding. Last check: 2007-11-03)
		The lower segments of the frogs backbone are fused, forming a stiff rod called the urostyle.
		Frogs are also important when it comes to teaching and scientific research.
		Adult frogs are used to teach students about the anatomy and physiology of vertebrates and help scientist learn about embryonic development.
	animal.discovery.com /fansites/jeffcorwin/carnival/frog/commonfrog.html (713 words)

	Wildlife in our garden: frogs, toads and newts (Site not responding. Last check: 2007-11-03)
		The Common Newt, also known as Smooth Newt or Brwon Eft, only spends a portion of its life in water, for in summer, autumn and winter it lives on land exclusively.
		Frogs often deposit their eggs in big lumps and some toads in long lines, newts deposit their eggs individually and attach them to waterplants.
		Frogs are extremely voracious and will do crazy things just to get a bite to eat, such as sudden high jumps, or sneaking through the water.
	www.gardensafari.net /english/frogs.htm (1690 words)

	The Common Frog - (Rana temporaria) (Site not responding. Last check: 2007-11-03)
		Frogs like to be near ponds which have plenty of algae and plants near the edge, usually with shallow edges so that they can easily climb out.
		Another threat for the common frog is from deliberate regular burning of bogland in the belief that this improves the grazing for farm stock.
		Frogs have very low levels of the necessary enzyme, photlayse, to repair the damage, and it is believed that this is a large contributor to their apparent demise.
	www.enfo.ie /leaflets/bs33.htm (1700 words)

	Common frog (Rana temporaria)
		Common frogs can reach a length of 10cm (4 inches) and are variable in colour, their upper surface ranging from yellow, through dark brown to red.
		The last variety is relatively common in the county and should not be mistaken for orange frogs which like albino frogs, are mutations which infrequently occur in Common frog populations throughout the UK.
		Frogs are explosive breeders with all spawn being laid over a ten day period at any one site.
	www.wartsoc.co.uk /rt.html (392 words)

	! Cophixalus ornatus ! Tropical Rainforest, Far North Queensland Australia
		These frogs are rainforest dwellers, sheltering on damp soil or leaf litter under stones or logs where it is found calling loudly from lower vegetation.
		The Common nursery-frog is found in rainforest and wet sclerophyll forest throughout the Wet Tropics.
		This frog is widely distributed through the rainforests of the Wet Tropics, from the Bluewater Range near Townsville, to Mt Spurgeon near Port Douglas.
	rainforest-australia.com /Cophixalus_ornatus.htm (400 words)

	AllRefer.com - frog (Vertebrate Zoology) - Encyclopedia
		Some frogs are highly aquatic, while others are better adapted to terrestrial habitats.
		The eggs : up to 20,000 at one time : are fertilized as they are laid in the water and are given buoyancy and protection by a gelatinous covering secreted by the female.
		There are over a dozen families of frogs; the term "true frog" is often applied to members of the family Ranidae.
	reference.allrefer.com /encyclopedia/F/frog.html (535 words)

	Common frog - Rana temporaria: More Information - ARKive (Site not responding. Last check: 2007-11-03)
		Undoubtedly Britain's most well-known amphibian, the common frog is often found in garden ponds (2).
		Elsewhere, the common frog occurs in most of Europe, with the exception of Portugal, most of Spain, Italy and Greece (4).
		Common frogs hibernate through the winter, either at the bottom of ponds (breathing through their skin) or on land under refuges such as compost heaps (5).
	www.arkive.org /species/ARK/amphibians/Rana_temporaria/more_info.html (726 words)

	Common Frog
		The life cycle of the Common Frog is familiar to most people; spawning takes place on average in March, the tadpoles develop throughout the summer and emerge as froglets in wet weather in August or September.
		Common Frogs feed on a variety of invertebrate prey which is mostly caught at night.
		The frog’s skin is smooth and needs to be moist at all times which limits this species to habitats close to fresh water or habitats that remain damp throughout the summer.
	www.herpconstrust.org.uk /animals/common_frog.htm (271 words)

	Common frog keystage 4 (Site not responding. Last check: 2007-11-03)
		This common frog (Rana temporaria) lives in damp undergrowth and eats insects, worms and slugs.
		Frogs only inhabit ponds during the breeding season in spring or whilst hibernating in the mud at the bottom of the pond in winter.
		Early frog fossils are known from the early Triassic of Madagascar (approx.
	www2002.stoke.gov.uk /museums/pmag/nathist/education/keystage/content/common_frog-keystage_4.htm (223 words)

	RAUK e-Forum: Marsh frog - impacting upon common frog??
		I'm pretty sure that marsh frog is one of the main reasons we have a strong grass snake population, so I too am puzzled by your contacts report of their decline.
		I appreciate that there are many factors that influence common frog populations, I was just highlighting numerous reports and observations that common frog seems to have declined in areas where marsh frog has become more abundant.
		The study I mentioned predicted no significant impact of marsh frog upon aquatic invert populations due to the wide variety of prey taken and the fact that despite the frogs aquatic nature the items were primarily terrestrial.
	www.herpetofauna.co.uk /forum/forum_posts.asp?TID=1009&PN=1 (1541 words)

	Common Questions: Frog and Toad Differences (Site not responding. Last check: 2007-11-03)
		The terms "frog" and "toad" are not taxonomic terms used by zoologists to classify tailless amphibians or anuran amphibians (order Anura).
		These words are old English words that have been used as names for the two most common species of anuran amphibians found in the British Isles: the Common Frog, Rana temporaria, and the Common Toad, Bufo bufo.
		All anurans that are closely related to Rana temporaria have been termed "true frogs" and those that are closely related to Bufo bufo are called "true toads".
	www.npwrc.usgs.gov /info/faqs/herps/ftdiff.htm (187 words)

	Frogs and Toads (Site not responding. Last check: 2007-11-03)
		Frogs from this family can be found on every continent except Antarctica.
		They are referred to as the "true frogs" because of their generalized body form and life history: the so-called generic frog.
		Members of this family include the bullfrog, common frog, green frog, leopard frog, marsh frog, pickerel frog, and wood frog.
	allaboutfrogs.org /weird/general/frogtoad.html (323 words)

	Tree Frogs of the Cairns Area
		There are roughly 54 species of frogs in the Wet Tropics Bioregion of Far North Queensland (from Cooktown to Townsville) and about 25 of these occur in Cairns (at least that was the estimate before the severe drought of 2000 to 2003).
		This frog disappears for most of the year and suddenly reappears in groups once the conditions are right for breeding.
		This is still a common frog in Cairns and likes hanging around under the eaves of houses and on the outside of windows at night.
	www.fdrproject.org /pages/localsps.htm (1235 words)

	British Garden Amphibians - Frogs, Toads and Newts
		Although called the common frog, sadly, because of changes to our environment and loss of habitat (ponds have been filled in and hedges and ditches removed) the frog is becoming more and more rare, which is where we can help enormously, by creating the habitats which they need in our gardens.
		Frogs are different from toads (more about them later) in that they have a moist feel and the back of a frog has a slightly raised appearance.
		Typically, adult frogs are seen to be dying over several weeks, resulting in dozens, or even hundreds, of deaths and as the name suggests their limbs are red in colour, for more information about this disease and to report any deaths you may see visit Froglife
	www.overthegardengate.net /wildlife/frogs.asp (2044 words)

	frog -- Encyclopædia Britannica
		Used strictly, the term may be limited to any member of the family Ranidae (true frogs), but more broadly the name frog is often used to distinguish smooth-skinned, leaping anurans from squat, warty, hopping ones, which are called toads.
		The body structure, or anatomy, of the frog is very similar to the anatomy of man. Both man and the frog have the same kinds of organs and systems of organs.
		Heqet was sometimes depicted with the body of a frog, and frog amulets were common in ancient Egypt as charms for fertility.
	www.britannica.com /eb/article-9035479 (587 words)

	Wildlife - Common Frog
		Common and widespread native to mainland Great Britain but introduced to Ireland where distribution rather patchy.
		Spawning takes place in December or January in West Country but not until March or April in N or upland districts.
		Mating pairs and masses of frogspawn are a common sight in most ponds.
	www.tiscali.co.uk /reference/encyclopaedia/wildlife/amphibians_common_frog.html (83 words)

	frogs and toads for children
		These frogs are difficult to identify as they like to jump into the water when disturbed and so all you hear is a series of 'plops' as you approach the places where they like to bask in the sun.!
		Anyone hearing noisy frogs calling could send details of the pond or lake to Kids Ark on conker@ukonline.co.uk and we will send them on to her.
		This is not a different species of frog, but one of those rare examples of frogs who are born without any pigmentation, both in their skin, which is white, and in their eyes, which are red.
	web.ukonline.co.uk /conker/pond-dip/frogs.htm (2522 words)

	Search Results for common - Encyclopædia Britannica
		Although it is technically the lower house, the House of Commons is predominant over the House of Lords, and the name...
		Commons, John R. American economist who became the foremost authority on U.S. labour in the first third of the 20th century.
		It is known in continental Europe as either grass frog or brown frog.
	www.britannica.com /search?query=common&submit=Find&source=MWTAB (325 words)

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