Karo,
Yautja,
13 years ago
Eye sockets without function would not exist from an evolutionary stand point, but as we may find out in "Prometheus" they might be designed right down to the decals by the Jockey race. By the sound of it, even though the "Prometheus" isn't supposed to be too directly linked to alien, they built the Jockey, and Giger supervised.
The warrior design is pretty inconsistent, with no in film explanation. It's interesting how little Jeunet seemed to care about the warrior alien design, and I base that on the Blu-Ray special features. It has the extra leg joint like the dog alien but also the tubes on the back are there again. AVP basically has the same design but they are blue-black instead of brown-black.