The local form is P. p. marginalis, restricted to semi-arid northeastern Brazil and possibly part of Goias. RPPN Mãe-da-lua.
References: Hellmayr and Conover 1942, Pinto and Camargo 1961.
Figure 1. During the dry season, some Picazuro Pigeons come every day to the reservoir, to drink. In 2007, I noted only one pair in the Reserve. At the end of 2008, I counted 5 individuals. I expect the numbers to increase now, since illegal hunting and trapping in the reserve has become less.
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Figure 2. The pretty song of the Picazuro Pigeon.
The sound was band-pass filtered (100 Hz, 1200 Hz)
and amplified with Raven Pro 1.2.1.
Spectrogram parameters: DFT size and window size 2048 samples.