over harvesting
People killing wolfs caused them to be endangered.
The Nile crocodile is not endangered.
The destruction of their habitat has caused chimpanzees to become endangered. Hunting and disease were also contributing factors to their declining numbers.
over hunting has caused the tiger to become endangered.
We through paper on the ground.
loss of habitat
The crow is certainly not endangered, an adaptable and intelligent species, common over it's range.
A lack of habitat caused by human encroachment.
The giant panda is neither extinct nor endangered. They are now classified as vulnerable.
Except for a small population in extreme southwestern United States, the jaguar is not endangered but listed as "near threatened."
Habitat loss, and bounty hunting.
People kept hunting them for their skin and teeth.