Western gorillas, black rhinos, and green sea turtles are among the hundred of endangered species.
There are about 500 different species world wide that are endangered.
You might be wondering, what are endangered species? Endangered species are animals that are underpopulated or at risk of becoming extinct. Habitat destruction, overexplotation, and introduction of foreign species are the three main reasons species become endangered. These animals are protected by laws in some nations, like the United States. Unfortunately, there are countries that don't have laws to protect these animals from becoming extinct forever.
You can help this cause by protecting these animals' habitats. The easiest way to protect their habitat is to prevent pollution, recycle, and save water. If you are really interested you could join an organization that help these animal.