Wwf: Species Directory: Endangered, Vulnerable, and Threatened Animals

After cutting down a forest to make a farm, how long would it take the environment to turn an abandoned farm back into a forest? Scholars study this exact scenario while they interpret many charts and graphs of the changing ecosystems as...

Why do zoologists collect animal specimens for research? And, how many animals is enough? Explore both sides of a current debate in the scientific community using a video that is part of a larger playlist on mammals. Topics include...

Dolphin mothers whose babies have died have been photographed in the wild, holding their young above the water and staying with them for days in what scientists believe is a period of mourning. Viewers explore grief and the mourning...

How are living organisms grouped? In this eight-minute video clip, the system of grouping them according to similarities and relationships is broken down straightforwardly. Sal explains the definition of species and how they must be able...

The U.S. Fish and Wildlife Service presents information on invasive species that invade ecosystems and threaten native species. Examples, legislation, teacher resources, and links to lots of additional resources are included.

Along came a spider, who sat down beside her. She screamed, but RJ wouldn't smash it because spiders are a limiting factor for other insects in an ecosystem. In this video, other common limiting factors for populations are listed....

A three-minute clip covers a new strategy for protecting the coral reefs of Fiji while still allowing fishermen to harvest the fish that people survive on. Connectivity is the name of the game. This colorfully animated resource is a...

Not all animals respond to pain the same way. Thanks to the structure of the nervous systems of different living organisms, vertebrates and invertebrates experience nociception—the sensory nervous system's response to pain.  

Out of all animals, elephants alone lack the ability to jump. Scholars learn all about animals using a presentation full of fun examples. It describes different types of animals, the biological similarities and differences between...

Can humans be infected by animal viruses? Pupils explore the phenomenon of viral evolution and learn about how animal viruses sometimes adapt to infect humans. They see how viruses are transmitted and what pathogens need to survive. The...