Endangered species are species of animal or plant that is seriously at risk of extinction. As to ‘why’ they have become endangered, there are usually a range of issues but mostly these are related to ‘human impacts’ such as habitat destruction, hunting / poaching, pollution.
Whilst there are different ‘lists’ , the most authoritative list is THE RED DATA LIST by IUCN
We only need to look at the numbers of endangered species to ‘show the picture’ of these creatures…..
There are many groups undertaking work for endangered species – New Zealand kakapo being helped by Forest & Bird ….