What is an endangered specie?

Endangered species are those who have a risk of extinction. There are so few left of their kind that they have a possibility to disappear from the planet all together. Many factors such as hunting, habitat lost, diseases and climate change are threatening species to be extinct. Endangered species usually have a declining population or a very limited range as well which means that those factors above could cause some species to disappear completely during our lifetimes.

Current extinction of species is thought to be greater than the expected natural extinction. Many species are disappearing before they are found. There are studies which show that a third of world's amphibians, a quarter of mammals, and one of eight birds are endangered. 

When some species have an alarming rate for disappearing it should be a concern for everyone. Not only these species bring beauty and wonder to the natural world, they are also important for global economy. A great diversity of species help to maintain the ecosystem essential for our existence. Protecting these species contribute to a thriving and healthy planet for people's health and well-being. For example forests slow climate change and filter water to oceans where one-sixth of world's food is provided.
Many countries have laws which protect species that have a risk of extinction, for example forbidding hunting or harming the environment which is necessary for the specie.

https://www.youtube.com/watch?v=RoTt9L1wAHo


References:
https://www.worldwildlife.org/species
http://www.arkive.org/endangered-species/