Silva, G.A. da, Frederico, R.G., Almeida, S.M., Salvador, G.N., Malacco, G.B. and Melo, C. de 2022. Conservation of the Black-collared Swallow, Pygochelidon melanoleuca (Wied, 1820) (Aves: Hirundinidae) in Brazil: potential negative impacts of hydropower plants. Biota Neotropica. 22, 1 (Jan. 2022).