Chincoteague NWR, VA April 5, 2015
A solitary Forster's Tern (flying in the top left corner), which we observed circling the pond throughout most of the morning.
Many seen along with red-billed gulls in a feeding frenzy with many large kahawai.
A very large flock of white-fronted tern at the Ashley estuary (at least 500 birds) with smaller numbers of black-fronted tern and Caspian tern associating with them.
Sterna is a genus of terns in the bird family Sternidae. It used to encompass most "white" terns indiscriminately, but mtDNA sequence comparisons have recently determined that this arrangement is paraphyletic (Bridge et al., 2005). It is now restricted to the typical large white terns occurring near-globally in coastal regions.