The Seed-finch Oryzoborus angolensis (Aves, Passeriformes, Oscines, Emberizinae) is very a
popular and appreciated species birdkeepers in Brazil, due to its melodious and varied song.
The song represents the species-specific recognition signal for the most of the birds. Songs
with long vocal repertoires, population and individual variations can be indicatives of vocal
learning. In this context, we studied the song of the Lesser seed finch Oryzoborus angolensis.
The song of O. angolensis is characterized as a sequence of pure notes organized and repeated
in discrete phrases. We analyze the song of 26 individuals, 16 in captivity and 10 wild from
different localities of their distribution area. The measures of physical parameters of the notes
(note duration, note interval, rhythm, minimum and maximum frequency) presented significant
global differences, considered here the characters that represents the species-specific code. We
observe that the notes are constituted mainly by widely modulated pure sounds and are
distributed in homogeneous way in our sample. We have found significant differences between
the repertoire of the individuals kept in captivity and wild.
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