What are two reasons that jaguars are endangered?

Although Jaguars are the biggest cats in North and South America, they are not invincible. Biologists have guessed that at least 64 jaguars have been killed in Arizona since the 1900’s. One of the reasons that jaguars are being killed is for everywhere is for their beautiful coat and teeth, which in some cultures is belived to protect the wearer from snakebites that is why

Because of their coat and teeth.
and also because of farmers. 
Farmers complained that the Jaguars were killing their cattle's so they decided that they will hunt down Jaguars and kill them.

What are the following resources?