BBC
Bbc Science & Nature: Platypus
Have you ever seen a platypus? This site has action photos and a detailed fact sheet to learn more about the egg-laying mammal.
The Field Museum
Field Museum: Exhibits: Evolving Planet: Tertiary
Delve into the Tertiary Period portion of the Evolving Planet exhibit, and trace the climate and continental shift during this time. Includes an overview of the period, a collection of images, and a look at the Tertiary Period's...
San Diego Zoo Global
San Diego Zoo: Platypus
This excellent resource from the San Diego Zoo presents extensive information on platypuses including details about their habitat, physical characteristics, size, diet, family life, conservation status, and fun facts.
San Diego Zoo Global
San Diego Zoo: Echidna
This excellent resource from the San Diego Zoo presents extensive information on echidnas including details about their habitat, physical characteristics, size, diet, family life, conservation status, and fun facts.
Animal Fact Guide
Animal Fact Guide: Platypus
Comprehensive guide to the platypus that features information on its physical characteristics, habitat (with a distribution map), diet, breeding patterns, unique traits and behavior, and conservation status.
A-Z Animals
A Z Animals: Animal Facts: Platypus (Ornithorhynchus Anatinus)
Provides photographs and a fact card about the platypus. Discusses where they are found, unusual physical characteristics, diet, habitat, predators, reproduction, and the threat of pollution.
The BIG zoo
The Big Zoo: Duck Billed Platypus
Here you can find a general overview of the duck-billed platypus. Content explores what this animal eats, where it lives, how its social life is structured, how it raises its young, and more.
San Diego Zoo Global
San Diego Zoo: Kids: Platypus
Colorful resource for learning useful facts about the platypus with photographs as well as information regarding their physical characteristics and unique features.
CK-12 Foundation
Ck 12: Biology: Mammalian Reproduction Study Guide
Review the reproduction of different types of mammals.
Australian Broadcasting Corporation
Australian Broadcasting Corporation: Walking With Dinosaurs: Fact Files: Steropodon
Steropdon was a prehistoric mammal that lived during the Cretaceous period. Read about some of its physical traits and its diet, and view a single image.
Biology 4 kids
Biology4 Kids: Introducing the Mammals
What different types of mammals exist in the world? Peruse this information about mammals that lay eggs, mammals with pouches, and those that give birth to live animals.
Unique Australian Animals
Unique Australian Animals: Platypus
The duck-billed platypus of eastern Australia is one of two mammals that bear their young in eggs. This illustrated article features many facts and photographs about this intriguing animal.
University of California
Ucmp: Placental Mammals
This brief article defines "placental mammals," lists examples of these animals, and describes the characteristics which render their classification.