There are millions of different types of animals on Earth, ranging from simple animals, such as sponges and worms, to more complex animals. This program explores complex animals, specifically the major vertebrate groups: fishes, amphibians, reptiles, birds, and mammals. Crisp, exciting video footage portrays the major characteristics of each vertebrate group. Specific examples of vertebrates are shown to illustrate the different characteristics of complex animals. Important terminology includes: vertebrae, backbone, gills, ectotherm, fins, metamorphosis, eggs, scales, feathers, and endotherm.

Originally released by Visual Learning, 2008. Streaming video file encoded with permission for digital streaming by Infobase on April 18, 2015. Teacher's guide available under Additional info tag.

What are Vertebrates? (2:32); --Fishes (1:43); -- Amphibians (1:15); -- Reptiles (1:22); -- Birds (1:42); -- Mammals (1:22); -- Summing Up (1:39); -- Video Assessment (1:42); -- Credits: Complex Animals (0:54);.