Little Gull (Larus minutus)
Above and below: An adult Little Gull in Howard Co., Maryland (4/6/2014). This cooperative first county record was found by Karen Darcy and Howard Patterson. (View MBP)
Below: An adult Little Gull with Bonaparte's Gulls at the Ocean City Inlet, Maryland (12/5/2010). In addition to the diagnostic black underwings, note the structural differences, including daintier impression, smaller bill, and very rounded wings. The latter feature provides a different overall flight impression even at a distance.