21. Amphibians Simple explanation of amphibians in the framework of the history of the Universe http://www.historyoftheuniverse.com/amphibia.html

Biological Environment Loading Basic Information Further Information Other Hotu Pages Earth Earlier Earlier ... Animals Later This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. Our new free weekly podcast Time Crystal tells this story as sci-fi fantasy Once the plants and arthropods were living on land there was plenty of food for any vertebrate which could manage to come out of the water. Some fish lived in ponds which dried up in summer. Their swim bladders evolved into lungs which they used to breathe air. They used their fins to crawl from one pond to another and these evolved into legs, two at the front and two at the back. The vertebrates which emerged from the water and became land animals around 350 million years ago we call amphibians "am-fib-ee-ans". Their name means "both lives" because they lived both in water and on land at different times in their lives. Leaving the water was one of the greatest steps ever taken by our ancestors. It needed changes in every part of the body. The most obvious changes were the appearance of legs and the ability to breathe. Other changes were not so obvious but were just as important. For example the way the blood flowed round the body had to change.

22. PARC - Partners In Amphibian And Reptile Conservation Working to conserve amphibians and reptiles by promoting research, sound habitat management, and educating the public. http://www.parcplace.org/

Looking for a career protecting reptiles and amphibians? Check out our Herp Job Postings. Click Here Sponsors Credits Privacy ... Contact Us

23. Amphibians - Facts And Profiles About Amphibians amphibians (Class Amphibia) include fascinating creatures such as salamanders, newts, caecilians, frogs, and toads. Amphibian larvea are often aquatic and go through a complex http://animals.about.com/od/amphibians/Amphibians.htm

zWASL=1 zGL='0';zGR='ca-about-radlink'; zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') zDO=0 Home Education Animals / Wildlife Animals / Wildlife Search Animals / Wildlife Animal Facts Habitat Facts Evolution Amphibians Amphibians (Class Amphibia) include fascinating creatures such as salamanders, newts, caecilians, frogs, and toads. Amphibian larvea are often aquatic and go through a complex metamorphosis process as they grow to adulthood. They have moist skin and do not have scales, feathers or hair. Caecilians (1) Frogs and Toads (6) Newts and Salamanders (1) 10 Facts About Amphibians Amphibians include frogs, toads, caecilians, newts and salamanders. Amphibians are the descendents of the first vertebrates to make the move from life in water to life on land. Despite their early colonization of terrestrial habitats, most lineages of amphibians have never fully severed their ties with aquatic habitats. zSB(3,3) The 3 Basic Amphibians Groups Amphibians were the first vertebrates to make the move from life in water to life on land. Despite their early colonization of terrestrial habitats, most lineages of amphibians have never fully severed their ties with aquatic habitats. Amphibian Pictures Pictures of amphibians, a group of four-legged vertebrates that includes frogs, toads, caecilians, newts and salamanders.

24. North American Amphibian Monitoring Program - Patuxent Wildlife Research Center Part of a global effort to study and conserve amphibians. http://www.pwrc.usgs.gov/naamp/

USGS Home Contact USGS Search USGS Patuxent Wildlife Research Center ... Patuxent Wildlife Research Center URL: http://www.pwrc.usgs.gov/naamp/ Contact: Linda Weir , naamp@usgs.gov Last Modified: 07/09/2010

25. Amphibians :: Saint Louis Zoo choose from the links below for animals found at the Zoo http://www.stlzoo.org/animals/abouttheanimals/amphibians/

Site Map Search Contact Press Room Selected shortcuts for... - Zoo Visitors - Educators - Students - Members - Donors - Sponsors - Event Planners - Prospective Staff - Professional Peers - Regional Community - Mission - History - Organization - Our Boards ... About the Animals Amphibians Amphibians choose from the links below for animals found at the Zoo: Caecilians Frogs and Toads Salamanders and Newts List All Amphibians There are more than 6,000 species of amphibians living today. This animal class includes toads and frogs, salamanders and newts, and caecilians. Almost all amphibians have thin, moist skin that helps them breathe. No other group of animals has this special skin. Most amphibians undergo a unique change from larvae to adults, called metamorphosis. All amphibians are ectotherms (what used to be called "cold-blooded"), a trait they share with invertebrates, fish, and reptiles. Thin-skinned Most amphibians have thin skin that is very permeable (allowing liquids and gases to pass through it easily). This is important for two reasons. First, it means that their skin helps them breathe, since oxygen passes easily through it. Second, it means that amphibians lose a lot of water through their skin. This is why most amphibians are found in moist or humid environments, where they can re-load their water reserves. Leading a Double-Double Life The word amphibian comes from the Greek word amphibios , meaning "a being with a double life." Some say their name refers to the fact that amphibians live in two places on land and in water. While dual residence

26. CGEE: Amphibian Facts Basic facts, a look at global population decline, and information about and photos of malformed amphibians. http://cgee.hamline.edu/frogs/science/frogfact.html

Amphibian Facts When talking about frogs, toads or salamanders, you will probably have some questions. These are some basic facts about amphibiansfrogs, toads, salamanders and caecilians. If you have further questions, check out the 'Frog'-quently Asked Questions or Did you know amphibians include... frogs, toads, salamanders and caecilians. The word means double lifemany species spend part of their life in aquatic (water) and terrestrial (land) environments. Because their skin lacks a shell, scales or outer drier covering, most amphibians live in wet or damp situations to prevent dehydration. Did you know metamorphosis is when... various animals undergo major changes in their body appearance and structure as they grow. They undergo meta (change) in their morpho (form). For instance, frogs lay eggs which grow into tadpoles, which undergo a dramatic change into froglets and finally grow to be an adult frog. The key thing in metamorphosis is a rapid, drastic change in form, for example from the tadpole to the frog. Butterflies are another example of animals that undergo metamorphosis, from a caterpillar to a flying butterfly. Did you know a bio-indicator is...

27. Amphibians | Define Amphibians At Dictionary.com –noun 1. any coldblooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing http://dictionary.reference.com/browse/amphibians?fromRef=true

28. Frogs & Amphibians Pictures, sounds, animation, links, and fun. Created by 11 year old Daniel Contreras. http://kidstuff.homestead.com/

*Cane Toads-An Unatural History AMPHPHIBIANS "What are they?" Frogs,Toads Salamanders ,and Newts Frogs and toads are the most common amphibians.The adults have bulging eyes,a squat body,and no tail.Frogs have smooth skin and long powerful back legs with webbed feet for jumping and swimming.They normally live in or near water.Toads have a dry,warty skin and shorter legs with less webbing between the toes.They prefer to live on land,except during breeding.You can find both Toads and Frogs around water.They like Swamps,Creeks,streams,Canals,lakes or any place with water.They do not need to be aqautic to like water.Some Toads are Semi-aquatic.Mosquitos and other insects and bugs are attracted to water,So Frogs and Toads go where the food is abundant. Did you know frogs breath through their skin as well as their lungs! To learn more fun facts Check out the page on Frog Fun Facts! Frog Books 2 Extremly Weird Frogs FIND MORE FROG ITEMS HERE Video's *National Geographics Rain Forest National Geographics- *Trials Of life Complete Set *Private Life Of Plants - Complete set.Great time-lapsed photography! I own this set!

29. Reptiles And Amphibians - National Zoo| FONZ Reptiles and amphibians at the National Zoo. Brought to you by the National Zoo FONZ. http://nationalzoo.si.edu/Animals/ReptilesAmphibians/

30. Amphibians Learn more about amphibians of North America and the world. Check out our amphibian section. http://www.kidport.com/RefLIB/Science/Animals/Amphibians.htm

31. The Frogs Of New England ThinkQuest site describes the anatomy, the habitats, and the life cycle of local amphibians. Includes games and activities. http://library.thinkquest.org/11034/

For text-based browsers or browsers that don't support frames, please follow this link Welcome to "The Frogs of New England" where you can identify, understand, and appreciate our tailless amphibian species. New England Frog Species T his is the area to find out all about the different species of frogs that inhabit this area of the country (although many of these live in other areas, also. Find out!) Frog Factoids A collection of interesting facts about many of the dif ferent frog species. Frog Basics This area takes a look at the b asic biology that makes a frog a frog, including areas on frog anatomy, their life cycle, where they live, their habitats, and more. Test your frog knowledge, enter our frog a rt contest, and play classic frog-related games in this section. Frog Discussion Board This is a forum to talk about f rog topics and ask questions about anything relating to this topic. Interesting frog links, sources fo r further study and information about the authors of this page.

32. Amphibian - New World Encyclopedia amphibians (class Amphibia) are coldblooded tetrapods (four-legged vertebrates) whose eggs lack a tough protective membrane around the embryo. The term amphibian comes from http://www.newworldencyclopedia.org/entry/Amphibian

Amphibian From New World Encyclopedia Jump to: navigation search Previous (Amos Tversky) Next (Amphibious assault ship) Amphibians White's Tree Frog (Litoria caerulea) Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Amphibia Linnaeus Orders Subclass Labyrinthodontia extinct Subclass Lepospondyli - extinct Subclass Lissamphibia Anura (or (Salientia) Caudata (or Urodela) Gymnophiona (or Apoda) Amphibians (class Amphibia ) are cold-blooded tetrapods (four-legged vertebrates ) whose eggs lack a tough protective membrane around the embryo. The term "amphibian" comes from the Greek amphi meaning "both" and bios meaning "life," hence, "double life." This reflects the fact that most amphibians are biphasic, having an aquatic stage where they spend part of their time, as well as a terrestrial stage. Many, but by no means all amphibians, undergo a change from an aquatic larval stage in which they acquire oxygen from water and lack limbs, to a four-legged, air-breathing adult form adapted for living on the land. There are about six thousand distinct living species of amphibians. Examples include frogs , toads, salamanders , newts, mudpuppies, and caecilians A highly diverse group of animals with only a core percentage exemplifying the most common defining characteristics, amphibians generally have smooth and naked

33. Amphibians | Buzzle.com amphibians amphibians include salamanders, newts, frogs, toads, and caecilians. They are smooth skinned rather than scaly, usually found near water, and most need to keep their http://www.buzzle.com/articles/amphibians/

Home World News Latest Articles Escape Hatch ... Endless Buzz Amphibians Amphibians include salamanders, newts, frogs, toads, and caecilians. They are smooth skinned rather than scaly, usually found near water, and most need to keep their skins wet to live. In their larval form they have gills, which some, like the salamanders, keep throughout life; but they also have lungs enabling them to breathe out of water. Amphibians are vertebrates and have four legs. To learn more about these fascinating creatures, browse the articles listed on this page. Reptiles and Amphibians Differences Closely related, yet intrinsically dissimilar - reptiles and amphibians differences are described below. Read on for some interesting facts, that you might be surprised to discover... Sonoran Desert Toad Sonoran desert toads are found in the Sonoran deserts. Also known as the Colorado river toad, they have distinctive features. Here is some information about the Sonoran desert toads. Read on... Mexican Walking Fish Mexican walking fish are one of the most strange looking creatures in the world. But these little water monsters are quite popular as pets. Read on to know more about these alien like creatures. What do Salamanders Eat Unaware of what do salamanders eat, many people who keep them as pets feed them stuff which is harmful for these small organisms. If you are aspiring to keep a salamander as a pet, you can go through this article in order to know more about salamanders and what do they eat.

34. W.E.S. - Japanese Giant Salamander Features information about the diet, habitat, and size of this salamander. http://library.thinkquest.org/19689/data/amphibians/japanese_salamander_frame.ht

35. Amphibians Amphibian populations are in decline in many areas of the world. In cities and in natural areas, in rainforests and in wetlands, countless areas which previously hosted a range http://frogweb.nbii.gov/

36. Ambystomatidae (Mole Salamanders) Photographs and general information. http://www.fs.fed.us/r4/amphibians/family_ambystomatidae.htm

AMBYSTOMATIDAE (Mole Salamanders) Ambystoma macrodactylum (Long-toed Salamander) Dicamptodon aterrimus (Idaho Giant Salamander) ... (Tiger Salamander) The mole salamanders (Family Ambystomatidae) are found only in North America. Like other members of the Order Caudata, they have slender bodies, long tails and distinct body regions with arms and legs of about the same size. They superficially resemble the lizards but lack the scaly skin, claws and external ear openings of these reptiles. Adult mole salamanders have stocky bodies and limbs, short broad heads and small eyes. A key characteristic is the absence of a nasolabial groove and the presence of distinct costal grooves. They have smooth skin and the teeth, in the roof of the mouth, are in one transverse row. Their tails are flattened. Males have a swollen vent during breeding and longer tails than females. Adults are nocturnal, terrestrial, and frequent moist locations above and below ground. Mole salamander larvae also have wide heads and large tailfins. Their gills are long and feathery. Like the adults, larvae are carnivorous. Most salamanders are voiceless. OTHER FAMILY PAGES: Ambystomatidae (Mole Salamanders) Scaphidae (Tailed Frog) ... TABLE OF CONTENTS USDA, Forest Service

37. BrainPOP | Science | Learn About Amphibians Animated Science, Health, Technology, Math, Social Studies, Arts Music and English movies, quizzes, activity pages and school homework help for K12 kids, aligned with state http://www.brainpop.com/science/diversityoflife/amphibians/

LOG IN SEARCH GO USERNAME: PASSWORD: GO Amphibians Ribbit! In this BrainPOP movie Tim and Moby teach you the history and biology of amphibians, those crawly-jumpy creatures that includes frogs, toads, salamanders, and newts. Discover why amphibians hold a special place in vertebrate history (hint: it has to do with their landlubber ways!) and find out how they manage to spend their lives in two very different types of environments. Most importantly, you’ll be introduced to the various types of amphibians, which differ quite a bit in terms of body type and lifestyle. They won’t teach you how to catch flies like frogs, though - you’re on your own with that! Watch the Science movie about show_flash("http://brainpop.speedera.net/www.brainpop.com/new_common_images/flash_files/84248.swf", "163", "80", ""); Related Topics: Vertebrates Six Kingdoms Gills Classification ... See a Full List of Topics BrainPOP is a business name of FWD Media, Inc. Your use of the site indicates your agreement to be bound by our and

38. Amphibians - Class Amphibia Class Amphibia. amphibians comprise a large and diverse class of animals. Usually placed in the same sentence as reptiles, they are really quite different. http://www.angelfire.com/mo2/animals1/amphibian/amphibia.html

Amphibians Please choose an order from the list below: Frogs Toads Salamanders and Newts Caecilians and Legless Amphibians Class Amphibia Gymnophiona (caecilians, legless amphibians) 160 sp Caudata (previously Urodela — salamanders, newts) 300 sp Anura (frogs, toads) 2500 sp Back Home

39. Amphibians And Reptiles At Patuxent Wildlife Research Center Searchable databases of literature references, researchers, and web sites dealing with amphibian conservation. The references database contain data only for USA. http://www.pwrc.usgs.gov/amphibians/

USGS Home Contact USGS Search USGS Patuxent Wildlife Research Center Patuxent Home Search Patuxent... Amphibians and Reptiles Research Activities Patuxent Wildlife Research Center scientists are currently conducting research on a wide variety of scientific topics. To view and search Patuxent's projects and other work by USGS staff, click on the following link: Research Topics Long-Term Programs Museum Collections - Acquisition and curation of scientific reference specimens (in partnership with the Smithsonian Institution) North American Amphibian Monitoring Program - a collaborative effort among regional partners and the USGS to monitor populations of vocal amphibians using a calling survey technique Northeast Amphibian Research and Monitoring Initiative - Patuxent participates in this intensive, long-term monitoring and related research on pond-breeding and stream-breeding amphibians on Department of Interior lands throughout the northeastern United States. Resources and References National Amphibian Atlas - county-based distribution maps of all amphibians known to occur in the United States Frog Call Quiz - a resource for learning frog call identification skills for species of the eastern United States Measuring and Monitoring Biological Diversity - Standard Methods for Amphibians Population Analysis Software - a variety of downloadable, statistical tools for analyzing bird or other population data

40. Amphibian Specialist Group Undertakes practical programs to conserve amphibians and their habitats around the world. Includes details of projects, publications, news, funding and the worldwide network. http://www.amphibians.org./

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