Why are jaguar endanger?

Answer 1

Hunters are killing them for their fur, and because people think they eat their farm stock. They are also losing their home, to development.
Because - as usual - the human race continues its unstoppable march across this planet - obliterating anything that 'gets in the way' !
The human population has acquired much of their habitat, which has made them homeless. Even the expansion of our farms and agriculture has added to their difficulties. In addition, poaching and hunting has endangered their species. They are widely hunted for sport and their spotted fur, which is in great demand and considered a high price in the black market.
Currently, the jaguar is not an endangered species.
because people, poachers, kill them and sell their fur illegally
They are shot illegally, or poached, also ranchers preform what is called "retaliation killings", killing Jaguars suspected of predation or stalking livestock. Whether there is proof that the Jaguar is the problem cat or not. In some places the Jaguars are killed on sight, no matter their hunting record, by hunters hired for that purpose only, by the ranchers. The issues with Jaguars hunting or stalking livestock is brought about in large part, due to their habitat being changed into ranches, farms and other human developments. The deforestation of their range will drive them to hunt whatever food is available. Plus the continued fragmentation of their remaining ranges increases their decline by eliminating the chances for genetic diversity among the species. For more details, please see the sites listed below.

Answer 2

They are near threatened, not endangered. But decline is habitat loss and poaching.

Answer 3

Only a small population of jaguars in the United States is endangered. The species, as a whole, is listed as "Near Threatened."