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Order Anura

ah nU' rah, amphibians that lack tails; frogs and toads

CONTENTS
The Skeleton of a Frog
The Skeleton of a Frog
The Internal Organs of a Frog
The Internal Organs of a Frog
A frog's heart has three chambers instead of four. And, although adult frogs breathe by means of lungs, they also breathe through their skin.
Green and Black Poison Dart Frog (Dendrobates auratus)
Green and Black Poison Dart Frog (Dendrobates auratus)
This frog gets its poison from ants that have high quantities of alkaloids in their tissues. Males tend to eggs after laying, and then take tadpoles to suitable places for development before abandoning them.
Surinam Toad (Pipa pipa)
Surinam Toad (Pipa pipa)
This unique-looking toad is distinguished from other toads by its flat appearance, triangular-shaped head, and small, star-like appendages on its short, weak, unwebbed front legs. n addition to its appearance, the Surinam Toad also has a fairly unqiue method of reproduction.
Madagascar Tomato Frog (Dyscophus antongilii)
Madagascar Tomato Frog (Dyscophus antongilii)
This is a rather large frog, with females being 3-4 inches long and weighing about 8 ounces. The back is uniformly orange to red in color, the underside is yellowish, and there may be black spots on the throat. It is found only on the northeast coast of Madagascar.
Crawfish Frog (Rana areolata)
The Crawfish Frog (Rana areolata)
is 2 to 3 inches long and is yellow to brown in color, with an all-white belly and numerous dark spots on the back, each with a lighter-colored ring surrounding it. It spends almost all of its adult life in a burrow and is therefore rarely seen outside of the breeding season.
Eastern Gray Trefrog (Hyla versicolor)
Eastern Gray Treefrog (Hyla versicolor)
Relatively large for a treefrog, the eastern gray is 1.25-2.5 inches long. Coloration ranges from greenish or brownish to gray and adults have several large, dark blotches on their backs. The ventral skin on the hind legs, in the groin region, may appear orange to golden yellow with black speckles and the belly is white.
Bullfrog (Rana catesbeiana)
The Bullfrog (Rana catesbeiana)
is the largest true frog in North America, averaging 3 to 6 inches in length, not counting its legs, which average 7 to 10 inches in length. While insects, earthworms and spiders form a major part of the diet, bullfrogs are also known to go after crayfish and other arthropods, as well as snakes, rodents, and even birds.
Puerto Rican Crested Toad (Peltophyrne lemur)
Puerto Rican Crested Toad (Peltophyrne lemur)
The only toad native to Puerto Rico, this species is confined to that island's Guanica National Forest. It is distinguished by a high crest above the eyes and a long, upturned snout.
Clawed Frog (Xenopus laevis)
The Clawed Frog (Xenopus laevis)
is about 4 inches long, with large females reaching up to 5 inches. The back legs are long and very muscular. The 3 inner toes on each back foot have sharp black claws.
Golden Poison Dart Frog (Phyllobates terribilis)
Golden Poison DartFrog (Phyllobates terribilis)
The most toxic species of frog, the golden poison dart's skin is saturated in an alkaloid poison that is so potent as little as 2 micrograms can be lethal to humans.
The Robinson Library >> Science >> Zoology >> Reptiles and Amphibians