Northern Gannets are migrating along the NH coast now. These large ( 72" wingspan) ocean birds breed in a few large colonies in the North Atlantic, then migrate down the East Coast and into the Gulf of Mexico. If you go to coastal locations now and bring your binoculars or spotting scopes, you may see them. Sometimes they are far out, other times they come close to shore.
I photographed this juvenile Northen Gannet in Feb. off the west coast of Florida. It takes several years for them to attain their adult plumage of mostly white with black wing tips. Very cool birds, go try to see them.
Photo © Lillian Stokes, 2007