The spot of white in the lower left hand corner of this shot is a bit of the "ambient life" advertised-- in this case, a chicken. Early Halo movies, such as the one from E3 of 2000, showed that game with different kinds of ambient life: dinosaurs and a flock of small, scaly horned ponies. They were all removed from the game prior to publication. Chickens became a favorite target of dwarves for many players, as the spray of feathers produced by the explosion is particularly satisfying.