Utah Education Network
Uen: Trb 4:5 Investigation 12 Amphibians & Reptiles
Activity provides for comparing and contrasting the behavior and structure of amphibians and reptiles of Utah.
CK-12 Foundation
Ck 12: Third Grade Science: Life Sci: Animal Characteristics and Classification
[Free Registration/Login may be required to access all resource tools.] Presents an overview of the major animals groups (mammals, birds, reptiles, amphibians, fish, arthropods, vertebrates, invertebrates, those having live births and...
Biology Pages
Kimball's Biology Pages: Vertebrate Lungs
This personal page defines and compares the gas exchanges by the lungs of amphibians, reptiles, birds, and mammals. Offers detailed images.
Other
Webucate: Free Multimedia Resources for Education
A labor of love created by a school in Great Britain. This is a well-organized image gallery with photos and other resources presented by topic, e.g., animals, places in the US, science, sports, etc. Though nothing to compare with a...