Skyhead

The Skyheads were beings from another dimension which resembled giant baby heads. They could fly through the air, generating a vortex slipstream in order to reach high speeds. The Skyheads used violently powerful gusts of air to attack. (AUDIO: UNIT Dominion)

Trivia
The skyhead species is some similar to the Giant Baby Head what appears on Phineas and Ferb cartoon series. Coincidentally, twice are revealed to be from another dimension.