Tersina viridis (MPR): occurs from Panama to eastern Brazil and northeastern Argentina, represented by resident populations as well as migratory populations that move short distances. Populations from the extreme south of the distribution (northern Argentina and southern Brazil) are migratory and fly north during austral winter (Hilty, 2011). In Brazil, it is present in RS only between September and April (Belton, 1985) and there are records of breeding activity in lowland Atlantic Forest areas in SP between September and March, which suggests that the species leaves this region between April and August (Aleixo & Galetti, 1997). Groups of 100 individuals or more have been reported between March and August in MG (Hilty, 2011). In the region of Garanhuns/PE, the species can be observed from May to September, which coincides with mistletoe fructification (W. Telino-Júnior, pers. obs.) and with the hypothesis of migration north during austral winter. In the region of Alter do Chão/PA, it is recorded only during the rainy season between January and June (Sanaiotti & Cintra, 2001). Photographic records (WikiAves, 2016) and banding data (SNA, 2016) do not confirm such patterns available in the literature, but in GO, MG, SP, PR, SC and RS the species presents breeding activity (September-December) related to the elevation: most records (78% or 18 out of 23) are from localities with an elevation of over 600 m. Breeding data from lower elevations need to be confirmed by the respective authors, because they may have been obtained in areas that are higher than the altitude of the center of the municipality (which is the available coordinate). The same altitudinal pattern has been observed for most of the young (72% or 8 out of 11) remaining over 600 m even though their records were more dispersed during the year. In the Amazon, its presence seems to be distributed in the months of the year, which suggests a pattern of regular occurrence, even though there are no records of breeding activity (WikiAves, 2016). This way, the species was classified as partially migratory due to its tendency of altitudinal restriction in breeding activity of the Atlantic Forest population and it needs to be studied further.

Published as part of 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 & Whitne, Bret Myers, 2018, An overview of migratory birds in Brazil, pp. 1-66 in Papéis Avulsos de Zoologia 58 on page 33, DOI: 10.11606/1807-0205/2018.58.03, http://zenodo.org/record/5234679