We quantified patterns of male and female parental care of the Swallow Tanager (Tersina viridis) in the activities of nest building, incubation, and feeding of nestlings during 4 reproductive seasons in Morrinhos, Goiás. The first individuals arrived in late June and the last individuals departed at the end of November, but incubation and feeding of nestlings occurred primarily in September and October, respectively. Males did not participate in incubation, but they contributed to nest building (24%) and feeding nestlings (55%; n = 8 nests). The results demonstrate biparental care and a socially monogamous breeding system for Swallow Tanager; however, low male involvement in total parental care, especially in incubation, and marked sexual dichromatism suggest the occurrence of extra-pair fertilization (EPF).
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