A hairy frog: During breeding season, the males of the west African rained frog ( colloquially called the hairy frog) develop hair like filaments of epidermis along their sides and legs. This increases the surface area involved in oxygen transfer so that the frogs can remain underwater near the egg clutches for longer periods.

A tailed frog: The so-called tailed frog of the pacific northwest has an extended copulatory organ that suggests a tail. Tailed frogs are the only frogs that internally fertilize eggs.

The largest frog: The West African Goliath frog is the world’s largest frog. This species attains a snout-to-vent length of 11 7/8 inches (30 cm) and a weight of more than 6.5 pounds

The smallest frog: The world’s tiniest frog is the Brazilian brachycephalid toad. Its largest recorded SVL is about 3/8 of an inch (9.8 mm). This species has no common name. Only slightly larger is the Cuban Leptodactylid, which is about 7/16 of an inch.

A poisonous frog: The deadliest skin secretions are produced by the tiny arrow- poison frog.

A poisonous toad: Marine or giant toads, produce a toxin in the shoulder glands that is so potent that it will debilitate or kill mammalian predators.

Lung less frog: The Titicaca frog, has no lungs, it respires through its baggy, highly vascularized skin.

The northernmost frog: Wood frogs, range above the Artic circle in Alaska

Turtle Frog: The amazing turtle frog, of arid Western Australia burrows deeply beneath the ground. Its egg clusters have been found nearly 4 feet deep in the earth. It undergoes direct development, having no free-swimming tadpole stage.

A “flying” frog : Many tropical old-world and neotropical tree frogs are assisted in gliding jumps by extensive webbing between the fingers and toes.

Vibrations for Communication: Besides audible calls, the Puerto Rican white-lipped frog, produces vibrations by tapping its vocal sacs on the ground.

Egg protection: The males of the Argentine Darwin’s frog, gather their soon-to-hatch eggs into their mouth. The eggs are then moved into the proportionately extensive vocal sac, where the tadpoles hatch, grow, and undergo metamorphosis, to finally emerge as youngsters. In a variation of the above theme, the females of the ( possibly extinct) Australian gastric-brood-ing frog, carry and brood their young in their stomach. Chemicals produced by the tadpoles inhibit the production of the female’s digestive enzymes. The young are forcibly disgorged following their metamorphosis!