Masks like this are used by Kwakwaka'wakw dancers to show their ancestors' ability to change from human form to animal spirit. As you can see, hinges and strings enable the dancer to emerge as one being and transform into another at the pull of a cord. The mask opens and closes to the beat of a drum.
Click on the images below to see BIG pictures of these Native American artifacts
Quechua child's costume, 1940
Wallawalla Leggings, 1870
Crow Child's Dress, 1915
Inupiaq football, 1910
Tlingit Headdress, 1870
Tlingit Rattle, 1880
Bear and Hawk Tlingit Rattle
Round-shaped rattles like this were used by Shamans during ceremonies to diagnose and cure illnesses. This rattle shows a bear on one side and a hawk on the other, animal spirits the shaman might have called upon to help him in his work.