Winged Creature is a creature created at least twice by Will Wright. During the Gadgetoff 2007 conference, Wright demonstrated the creation of the creature and did not save it. However, seconds later, he used the same creature to navigate the world, indicating he had already created the same creature beforehand and saved it. The name of this creature is unknown.
The winged creature may have made its first appearance in the 2005 GDC video. Flying creatures are seen in the video, but cannot be made out. It is clear that these creatures have no distinguished head, two limbs, two wings, and a long tail, very much like the winged creature seen here. The creature in that video flies with its tail lowered, but due to the changed mechanics of the game between 2005 and 2007, it is quite likely that they are in fact the same creature.