info:eu-repo/semantics/article
Patterns of nest orientation in the Golden billed Saltator (Saltator aurantiirostris) in central Argentina
Fecha
2018-08-17Registro en:
Schaaf, Alejandro Alberto; Rojas, Tobias Nicolas; Diaz, Agustín Eduardo; Peluc, Susana Ines; Patterns of nest orientation in the Golden billed Saltator (Saltator aurantiirostris) in central Argentina; Neotropical Ornithological Society; Ornitología Neotropical; 29; 17-8-2018; 199-203
1075-4377
CONICET Digital
CONICET
Autor
Schaaf, Alejandro Alberto
Rojas, Tobias Nicolas
Diaz, Agustín Eduardo
Peluc, Susana Ines
Resumen
In birds, nest location defines the microclimatic conditions for the development of eggs and nestlings. In general, direct solar radiation and wind are the main determinants of bird nest orientation patterns. In this study, we analyzed the orientation pattern of nests of the Golden-billed Saltator (Saltator aurantiirostris) in central Argentina. The nests were mainly oriented towards the north side of the substrate plant, with greater concealment from thesouth and west. Nest mean orientation in the species matches the conditions of higher solar radiation in the plant, although the vegetation concealment from above and west may compensate for the high exposure to solar radiationin the species. Nests were also placed in sites further from the foliage edge and were supported by more branches, variables that may be associated with reduced risk of nest predation. Overall our results show that the selection ofnesting sites in the Golden-billed Saltator may involve a number of decisions to maximize microclimatic conditions that may aid the thermoregulation of eggs and nestlings, while minimizing the risk of nest predation.