Black Tern (Chlidonias niger)
Above: A Black Tern in the late afternoon light in Hurlock, Maryland (8/23/2009).
Below seven: A Black Tern in Kent Co., Maryland (9/22/2007).
Below: A Black Tern at Blackwater NWR, Dorchester Co., Maryland (8/26/2007).
Below: Some of the 23 migrant Black Terns that were feeding in Hurlock, Maryland at dusk on 9/10/2011. After foraging for a while, they kettled up and departed to the southeast.