Sandwich Tern & Little Tern

The Sandwich Tern (Thalasseus sandvicensis) is a seabird of the tern family Sternidae. The Sandwich Tern is a medium-large tern with grey upperparts, white underparts, a yellow-tipped black bill and a shaggy black crest which becomes less extensive in winter with a white crown. Young birds bear grey and brown scalloped plumage on their backs and wings. It is a vocal bird. It nests in a ground scrape and lays one to three eggs.
Terns are seabirds in the family Sternidae that have a worldwide distribution and are normally found near the sea, rivers or wetlands. The terns are birds of open habitats that typically breed in noisy colonies and lay their eggs on bare ground with little or no nest material. However, the marsh terns construct floating nests from the vegetation in their wetland habitats, and a few species build simple nests in trees, on cliffs or in crevices.