For those who guessed (or even better deduced) that this bird was a skua - congratulations! It is, in fact, a Brown Skua (Stercorarius antarctica; subsp. lonnbergii) photographed on Macquarie Island (Australia) in November 2007. The taxonomy of Skuas is complex and far from complete resolution. One thing that is known, however, is that the Brown Skua is very confiding and an opportunistic feeder, as seen in the additional photograph below, depicting a hungry Skua searching for dropped chewing gum on a boot sole.
