R. D. Lima, W. Menq, and F. Pallinger, “Distribution and identification of the White-collared Kite Leptodon forbesi and the juvenile plumages of the Gray-headed Kite Leptodon cayanensis”, Pap. Avulsos Zool., vol. 60, p. e20206050, Sep. 2020, doi: 10.11606/1807-0205/2020.60.50.