Other
All About Frogs: Life Cycle of a Frog
Understand the reproduction and life cycle of a frog from mating through spawn, eggs, tadpoles, and growing legs to the final frog. Nice details.
PBS
Pbs Nature: Frogs and Toads
Do you know how to tell the difference between a frog and a toad? This site provides interesting facts and information about this type of amphibian from where they live to what they eat and more.
BBC
Bbc: Nature: Wildlife: Common Frog
Use this site to learn all about the life of a frog. Read this detailed fact sheet and examine these photos for further information.
University of Wisconsin
University of Wisconsin: Amphibian Embryology Tutorial
This amphibian embryology tutorial takes an in depth look at the question "Why study amphibians?". Through this tutorial students will develop a better understanding of vertebrate development.
Other
Amphibian and Reptile Conservation: Natterjack Toad
Description of the Natterjack Toad, including how to identify it, and its life cycle. It also provides a video [6:06] of an edition of the Living World with Lionel Kellaway, focussing on the natterjack chorus.