Rynchopidae, Bonaparte, 1838

Somenzari, Marina, Amaral, Priscilla Prudente do, Cueto, Víctor R., Guaraldo, André de Camargo, Jahn, Alex E., Lima, Diego Mendes, Lima, Pedro Cerqueira, Lugarini, Camile, Machado, Caio Graco, Martinez, Jaime, Nascimento, João Luiz Xavier do, Pacheco, José Fernando, Paludo, Danielle, Prestes, Nêmora Pauletti, Serafini, Patrícia Pereira, Silveira, Luís Fábio, Sousa, Antônio Emanuel Barreto Alves de, Sousa, Nathália Alves de, Souza, Manuella Andrade de, Telino-Júnior, Wallace Rodrigues & Whitney, Bret Myers, 2018, An overview of migratory birds in Brazil, Papéis Avulsos de Zoologia 58, pp. 1-66 : 27

Rynchopidae

Rynchops niger (MPR) : occurs as resident in some coastal areas in eastern USA, Mexico and northern South America; occurs as migrant in the coast of South America, Central America and part of the USA. It breeds in the Amazon and in great part of central and eastern Brazil ( Zusi, 1996).This species is recorded in Brazil all year round, but evidence of breeding activity seems to be restricted to RS, the Amazonian and Central-West regions, specifically in AM, PA, RO, TO, MT, MS, GO (WikiAves, 2016). Data from banding and recapture suggests that nestlings born in the Pantanal in MT and in the Manaus region/ AM fly to southern Brazil in RS, to Uruguay and Argentina (SNA, 2016). During a one-year study in the estuary of Cananéia-Iguape-Ilha Comprida/SP, this species was present in all months exhibited no evidence of breeding activity and presented population fluctuations ( Barbieri, 2007). Although the available data is still not enough to define a migratory pattern, the fact that this species only breeds in the aforementioned places suggests the existence of migratory movement.