Humans.. mostly
Humans are the main reason that puma is endangered species. As a species, the puma is not an endangered species. Only the Florida race is endangered.
According to the Red List of endangered wildlife, over a thousand bird species around the world are threatened with extinction. The main reason for birds becoming extinct is believed to be loss of habitat.
Habitat loss threatens the jaguar, but this species is not an endangered species, rather listed as near threatened.
species
Species.
The gray wolf is not an endangered species. Listed as least concern by the IUCN.
Humanity itself causes endangerment of animal species due to poaching, deforestation and pollution.
The main reason men become sterile is the cause of a low sperm count. One could also choose to become sterile and have a vasectomy so as to not have any more children.
yes
They are being hunted or their environment is being changed.
To gain Wealth
Mostly because Japanese people have killed them for their meat and blubber.