The three modern orders of amphibians are Anura (the frogs and toads), Urodela (the salamanders), and Apoda (the caecilians). The number of known amphibian species is approximately 7,000, of which nearly 90% are frogs.The smallest amphibian (and vertebrate) in the world is a frog from New Guinea (Paedophryne amauensis) with a length of just 7.7 mm (0.30 in).mphibians have a skeletal system that is structurally homologous to other tetrapods, though with a number of variations. They all have four limbs except for the legless caecilians and a few species of salamander with reduced or no limbs. The bones are hollow and lightweight.
Harrison Ford Honored With Prestigious Wright Brothers Award. One of the general aviation communityâs own was honored on December 17, 2010, for his long-standing advocacy in support of aviation at the Aero Club of Washingtonâs annual Wright Memorial Dinner, which was attended by hundreds of aviation leaders from government and industry.
Dayton also plays a role in a nickname given to the state of Ohio â Birthplace of Aviation. Dayton is the hometown of the Wright brothers, aviation pioneers who are credited with inventing and building the world's first successful airplane.