This is a baby seagull.  At one point Sara and I were both terrified by this bird, and neither of us really know why.  It came up to us looking all crazy and we ended up standing on a wall and trying to shoo it away from us with a grocery bag until a young lady walking her dog (laughing at us hysterically) approached us and explained that it was just a baby and that we should not be scared, but that the adult seagulls had attacked her dog one time.... very odd indeed.