Chinchillas are endangered mainly due to hunting for their fur. It takes 100 pelts to make one fur coat! Those loss of habitat has adversely affected wild chinchillas as well.
Chinchillas are rabbit sized, have big mouse like ears, squirrel-shaped bodies, and bushy tails.
These South American rodents are also raised as pets. Here is a video of a pet mother chinchilla and her babies. You can hear them squeak.