Mythical creatures: thunderbird. (Click for more creatures) - the Native Americans believed that certain birds brought storms with them. The myth probably originated when they noticed birds would soar long and high on the warm updrafts that roll through before a storm.
The Thunderbird is a legendary creature in North American indigenous peoples' history and culture. It's considered a "supernatural" bird of power and strength. It is especially important, and richly depicted, in the art, songs and oral histories of many Pacific Northwest Coast cultures, but is also found in various forms among the peoples of the American Southwest and Great Plains.