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Information on a nest from Buenos Aires Province and a description of the first pennaccous plumage of Lhe Spot-winged Falconet are given for the first time
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Narosky, Tito; Babarskas, Marcos; López Lanús, Bernabé M. "Hallazgo del primer nido de Halconcito Gris (Spiziapteryx circumcinctus) en Buenos Aires" (1992). El Hornero. 013(03)