Amphibians

Artical: "World's frog species face extinction" []

Video: []

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PICTURES:

Flatwoods Salamanders []

Milk Frog []

Red Eye Tree Frog []

Mudpuppy []

Hellbender []

Information **Amphibians:** evolution from water to land
 * **Examples:** frogs, salamanders, toads
 * Amphibian Characteristics:
 * Amphibian: means "double life"
 * Live in water and on lan
 * Amphibians are a link between the fish and reptiles
 * Believed to have evolved from the lobe finned fish
 * Body Structures:
 * Legs: tetrapods (4 legs)
 * Moist skin
 *  Reproduction:
 * External fertilization
 * External development in aquatic egg
 * Must return to water to lay eggs
 * Metamorphosis:
 * A: Egg
 * B-E: Tadpole
 * F: Adult
 * Changes: lose gills, lose tails, grow legs
 * Amphibian Taxonomy:
 * Kingdom: Animalia
 * Phylum: Chordata
 * Subphylum:Vertebrata
 * Class: Amphibia
 * Orders: caudata, anura, caecilia
 * Order Caudata
 * Salamanders
 * Amphibians with tails and smooth skin
 * Examples:
 * Newts: salamanders that live only in water
 * Muddpuppy: largest local salamander (2 feet)
 * Japanese Hellbender: largest in the world (5 feet)
 *  Order Carcilia
 * Limbless amphibians
 * Live only tropical climates
 * Usually blind
 * Ex: Caecilians
 * Order Anura
 * General Information
 * Some are poisonous
 * Vocal Chords produce sounds for mating
 * Examples:
 * Frogs: more aquatic
 * Toads: more terrestrial