The Ouroboros (serpent or dragon eating its own tail) often symbolize self-reflexivity or cyclicality, especially in the sense of something constantly re-creating itself, the eternal return, and other things such as the phoenix which operate in cycles that begin anew as soon as they end.
Le Harry Potter Inspired Wand Making Materials in Glass Bottles - Unicorn Hair, Dragon Heartstring, & Phoenix Feathers
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.