Reproduction of the Seven-Coloured Tanager (Tangara fastuosa) in the Atlantic Forest of North-Eastern Brazil

The Seven-coloured Tanager Tangara fastuosa is a threatened species, with little data available on its reproduction. Between 1987 and 2025, 29 nests were found around the Pedra Talhada Biological Reserve in Quebrangulo, Alagoas, north-eastern Brazil. Nests were cup-shaped, with average external dimensions of 11.0 × 7.3 cm and average internal dimensions of 6.2 × 3.7 cm. They were built at an average height of 5.4 m above ground. Mean clutch size was 2.7 eggs, which measured 20.9 × 15.6 mm, and weighed 2.6 g. Eggs were beige in colour with greenish undertones and were heavily spotted with purple or rusty brown. Average incubation period was 13.8 days, and average nestling period was 15.4 days. Apparent nest success was 51.7%, with predation being the main cause of nest failure. Parents, sometimes assisted by helpers, fed the nestlings with small fruits, fruit pulp, seeds, and various arthropods. Our records provide new information on the reproduction of this species in interior and edge forests. However, forest destruction and capture for the illegal wildlife trade pose a threat to the survival of its populations, both remaining an issue in the study area.