Smithsonian Institution
Smithsonian National Zoo: Reptile Recovery Center
This website presents fact sheets about numerous reptiles. Choose from a pull-down list between snakes, lizards, crocodilians, and turtles. The fact sheets contain information such as taxonomy, distribution and habitat, eating habits,...
A-Z Animals
A Z Animals: Animal Facts: African Clawed Frog (Xenopus Laevis)
Explore the world of the African Clawed Frog and gain a greater understanding of this amphibian through statistics and information on its appearance, habitat, behaviour, diet, and more.
Khan Academy
Khan Academy: Frog Development Examples
How do you build a frog from a single cell? Learn how body axes are established and nerve tissue is induced in frog embryos.
Other
The frog.org: Biology, Movement
TheFrog.org provides a site dedicated to information and links on frogs. This particular page discusses how the amphibian moves.