Amphibians are cold-blooded, smooth-skinned vertebrates. Most live some of their life in water and some on land. The most common amphibian critter is a frog but there are many others. Read about Wisconsin's many amphibians here.

Information about amphibians, animals that can survive in a wide variety of habitats and cli-ates. The article discusses their behavior, diet, predators, conservation status, and evolution. (Published: August 29, 2008)

This site provides a general description of amphibians and then describes in detail the characteristics of local animals in southern Michigan. Pictures, classification information, and sound clips of some amphibians are provided.

This resource offers extensive information about amphibians. Visitors can click on the listed amphibians for further information.

This comprehensive study guide covers the main terms and concepts needed for a biology unit on amphibians.

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.

The evolution of amphibians from prehistoric days is described, and the challenges they face when living in a desert environment, of which the ability to reproduce is the greatest. How they manage to survive in a desert is explained in...

What makes an amphibian? Check out this site for some exciting characteristics.

A basic description of why we study amphibians. This site contains an interesting three-dimensional reconstruction of a frog skeleton.

From ABC News in Science, Will Dunham's article explores the evolutionary history of eating habits within the realms of amphibians. It specifically refers to the ancient amphibians use of biting food rather than sucking it.

Thorough resource investigates amphibians with a description, pictures, and maps. Includes facts on ecology, evolution, biology, and external links.

South Carolina Reptiles & Amphibians profiles the eastern cottonmouth. A great site for photos-- both the eastern and Florida cottonmouth are pictured.

The most common species in the UK, the Grass Snake is identified by the Reptiles and Amphibians of the UK website. Detailed description and photos included.

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.

A good overview and index of all the classes and species of amphibians, including sub-classes, orders, and characteristics.

The Great Plains Toad and the Northern Leopard Frog live in Suffield National Wildlife Area in Alberta, among other areas. These are two Canadian amphibians whose wetlands habitats are increasingly threatened by human activities....

This competent site provides general information about amphibians and then focuses on the amphibians found in southeastern Michigan. Information, pictures, sound clips, and classification groupings are provided.

The Encyclopedia of Life presents this in-depth overview of Amphibians (Amphibia), including their habitats, size, conservation status, and much more. Images of this class and maps of its global distribution can also be found here.

Provides fascinating facts and images of frogs and salamanders plus a map of where they can be found.

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.

Page presents and discusses the "double life" of amphibians, prior to and following metamorphosis. Good site, using primarily text-based methods.

An excellent page for viewing the life cycle and development of the amphibians.

Profile of one species of Caecilian, the Rio Cauca from Colombia and Venezuela.

Provides photographs and a fact card about the salamander, an amphibian. Discusses where they are found, physical characteristics, the diversity of species, their unique skin and gland secretions, and population decline from threats to...