They primarily live in the forested northern and eastern parts of Beni and northwestern Santa Cruz departments of Bolivia.

[2][failed verification] The Sirionós are tall and strong, although thin, due to the continuous movement and hardships of wildlife.

[3] Sirionó people originated in the Gran Chaco and moved north in the Amazon rainforest.

Sirionó people died from diseases introduced by Europeans, and by the dawn of the 20th century, only 500 survived.

[4] Sirionó traditionally were semi-nomadic and fished, hunted, gathered wild plants, and farmed.