So this fiugure also appears on the GK artwork...? Interesting...
It may have to do with Abraxas, for remember this God could be represented as a creature with bird or lion head, human torso and serpent limbs or a pain in the neck for our TS members.
Or it could be a representation of an Egyptian God, Horus, that could also explain the eye on the cover of GK. But this is only if we look at the head as a bird, like I do when I look at my "Sirius B" CD.
EDIT: I just read the lyrics for "Der Mitternacht Löwe" and at some point it says "Fear the eagle", it could have something to do with this figure.
It could also be a symbol Thomas Ewerhard just came up with.