From Creatures Wikia
The Angel Norns were created by Lis Morris, Ricardo2000 and Nimue (children sprites). They are available for Creatures 2 only and occupy Geat slot A. They use the Akamai Canny Norn genome. They are able to fly once a COB is injected into the world, the first Creatures breed to achieve this.
The Angel Norns can be found at Creatures of Avalon.