| morphological variation of the long-tailed reed finch <i>donacospiza</i> <i>albifrons</i> (vieillot, 1817) (aves: thraupidae). | the long-tailed reed finch donacospiza albifrons of south-central south america is patchily distributed in a variety of open habitats, usually near water. i present a detailed study of morphological variation based on 141 specimens, describing its plumage sequence and presenting notes on its molt and breeding. the long-tailed reed finch shows no sexual dichromatism, but males average longer-winged than females. the species shows three distinct age-related plumages, which are redescribed here. it ... | 2017 | 29242473 |