The Black Skimmer, Rynchops niger, is a tern-like seabird, one of three very similar bird species in the skimmer family. It breeds in North and South America. Northern populations winter in the warmer waters of the Caribbean and the tropical and subtropical Pacific coasts, but the South American races make only shorter movements in response to annual floods which extend their feeding areas in the river shallows.

La familia Rynchopidae es un grupo pequeño de aves similares a gaviotas en el orden Charadriiformes. La familia se compone de un solo género, Rynchops, y sus tres especies que se encuentran en las Americas, África y el sur de Asia.

The Royal Tern

The Royal Tern (Thalasseus maximus, syn. Sterna maxima – see Bridge et al., 2005) is a seabird in the tern family Sternidae. This bird has two distinctive subspecies.

T. m. maximus breeds on the Atlantic and Pacific coasts of the southern USA and Mexico into the Caribbean. The slightly smaller T. m. albididorsalis breeds in coastal west Africa.

Brown Noddy

The Brown Noddy or Common Noddy Anous stolidus is a seabird from the tern family. The largest of the noddies, it can be told from the closely related Black Noddy by its larger size and plumage, which is dark brown rather than black. The Brown Noddy is a tropical seabird with a worldwide distribution, ranging from Hawaii to the Tuamotu Archipelago and Australia in the Pacific Ocean, from the Red Sea to the Seychelles and Australia in the Indian Ocean and in the Caribbean to Tristan da Cunha in the Atlantic Ocean. The Brown Noddy is colonial, usually nesting on the in elevated situations on cliffs or in short trees or shrubs. It only occasionally nests on the ground. A single egg is laid by the female of a pair each breeding season.

Caspian Tern

The Caspian Tern (Hydroprogne caspia, formerly Sterna caspia;[1] syn. Hydroprogne tschegrava) is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic, with no subspecies accepted.[2] In New Zealand it is also known by the Maori name Taranui.

Caspia

Hydroprogne caspia o pagaza piquirroja es un ave Charadriiformes de distribución europea y en peligro de extinción. Se caracteriza por su gran tamaño, con una envergadura de aproximadamente 1 m y 50 cm de longitud, por lo que es el mayor de los charranes, y por su pico grande, rojo, con marcas negras. Posee un píleo negro con manchas blancas, y unas patas negras y largas.

Herring Gull

The Herring Gull, Larus argentatus, is a large gull which breeds across North America, Europe and Asia. Some herring gulls, especially those resident in colder areas, migrate further south in winter, but many are permanent residents, e.g. those on the lower Great Lakes, on the east coast of North America or at the North Sea shores. Herring Gulls are also abundant around inland garbage dumps, and some have even adapted to life in inland cities.

Gaviota argéntea

La gaviota argéntea es un ave ruidosa y pendenciera y una de las gaviotas más extendidas y adaptables del hemisferio norte. Se alimentan en cultivos y alrededor de los depósitos de basura, así como en la playa y con frecuencia sigue a los barcos pesqueros esperando que lancen cualquier resto por la borda.

California Gull

Gull but larger than the Ring-billed Gull.

They are migratory, most moving to the Pacific coast in winter. It is only then that this bird is regularly found in western California (Sibley 2000).

Larus es un gran género de ave marinas, la mayoría de las gaviotas. Se distribuye mundialmente.

Son aves de mediano a gran porte, típicamente grises o blancos, frecuentemente con marcas negras en la cabeza o en las alas. Tienen diferentes tipos de picos, patas palmadas.

Ring-billed Gull

The Ring-billed Gull (Larus delawarensis) is a medium-sized gull.

They are migratory and most move south to the Gulf of Mexico and the Atlantic and Pacific coasts of North America, also the Great Lakes.

Gaviota de Delaware

Tiene el dorso de color gris perla y una franja negra en el extremo del pico. Anida en ruidosas colinas, a menudo junto a un lago o embalse, aunque en invierno suele anidar en la costa. Busca su comida allí donde surge la oportunidad, capturando peces, invertebrados en el suelo o buscando carroña.