1. Endangered Species Vulnerable species Threatened species Endangered species

2. Vulnerable Species: Mexican Long-tongued bat A vulnerable species is in danger because its numbers are low or declining.

3. Vulnerable species: leopard frog

4. Threatened species: indigo snake A threatened species is in danger because its habitat is in trouble.

5. Threatened species: red kangaroo

6. Endangered species: Siberian tiger An endangered species is in immediate danger of dying out completely, or becoming extinct.

7. Endangered species: snow leopard

8. Factors of Endangerment 1. Destruction of both aquatic and terrestrial habitats. 2. Exploitation of animals 3. Demand for animal parts for use in certain foods or medicines. 4. Introducing non-native species to an environment. 5. Natural causes: changes in the weather, introducing an exotic species to a new environment

9. Importance of the diversity of being Foxglove plant ( 毛地黃 ) is the main source of the drug digitalis ( 強心劑 ).

10. World Wildlife Fund http://www.worldwildlife.org/

12. National Wildlife Federation http://www.nwf.org/