FIGURE 4 in Morphological variation of the Long-tailed Reed Finch Donacospiza albifrons (Vieillot, 1817) (Aves: Thraupidae)

FIGURE 4. Geographic variation in coloration of definitive basic plumaged specimens of the Long-tailed Reed Finch Donacospiza albifrons. All specimens, from left to right, were collected in the following Brazilian states: DZUFMG 6286— Minas Gerais; MZUSP 78041—São Paulo; MZUSP 28940—São Paulo; MZUSP 2640—São Paulo; MZUSP 19941—São Paulo; MZUSP 2625—São Paulo; MZUP 6915—Paraná; and MZUSP 38792—Rio Grande do Sul. Note the clinal variation in plumage coloration, with northern birds paler and almost unstreaked on the upperparts (left), and with southern birds markedly buff and streaked on the upperparts (right).