The Rainbow Rabbit
The Rainbow Rabbit is a folkloric creature who's been mainly witnessed in Kansas and Oklahoma.
Main witnesses:
Louie and Maggie Wilson (farmers), on the 7th of June 1968,
Lydia Spengler (age 17) and her family and friends during her birthday party, on the 18th of August 1975
And the entire population of Cimarron, on the 27th of July 1982
Some thinks that he can be seen under certain meteorological conditions.
The apparitions always occured brievely (1 to 5 minutes) before a big tornado. He's described like a giant foggy rabbit-like shape, see-through and irridescent.
The Rabbit walks all the way over a rainbow and disappears. The phenomenon ends by the formation of a "Sundog".
As a result some believe he's warning us about twisters and tornadoes coming.