The Thunderbird is a mythological bird spirit originating from different tribes of the first people of America. It is a supernatural being of great strength and creates thunder by flapping its enormous wings and lightning bolts flash out of its powerful light filled eyes. It is sometimes shown as a hawk or eagle or a half-human, half-bird hybrid. The Thunderbird is a protector of some humans and controls the upper world. It will intervene by throwing lightning bolts down at the evil underworld.
There are petroglyphs and iconography of Thunderbirds dating back 4000 years. The iconography of a Thunderbird is in an X shape. The wings are stretched out, the head is in profile looking either right or left with its feet and legs stretched apart to form an X.