A few nice Alien images I found:
Image by kreezzalee Alien isn't very hostile, but likes killing things. (As any alien should). He has a big heart, and loves hangin' with the guys.
Image by Rickydavid [...] Whatever is not commonly seen is condemned as alien [...] -- Quote by Iris Chang Ostia, Italy (June, 2008) Nikon D70, Tokina 12-24 f/4, 12mm - f/22 - 20s, HDR3xp +2,-2EV, ND8 filter + Cokin Grad dark Tobacco
Image by angelferd Like PicassoÂ´s bull, but this is an alien =P