Chromosome polymorphism due to pericentric inversion in Zonotrichia capensis (Emberizidae-Passeriformes-Aves)

Chromosomal polymorphism involving chromosome pairs 3 and 5 problably due to a pericentric inversion is reported for 60 specimens of Zonotrichia capensis (Passeriformes-Aves). The frequency of seven different karyotypes, due to the fact that chromosome 3 is present in the 3st and 3sm conditions and chromosome 5 in the 5st and 5m conditions, and the significance of this polymorphism are discussed for the genus Zonotrichia and for other genera from the same family (Emberizidae).