FIGURE 6 in Distribution and status of Turdus thrushes in white-sand areas of eastern Colombia, with a new subspecies of T. leucomelas

FIGURE 6. Plumage variation among populations of T. ignobilis and T. arthuri from eastern Colombia. From left to right: T. i. ignobilis, male ICN 20637, Cundinamarca, Laguna de Pedropalo, and male ICN 21095, Cundinamarca, Planicies de Fusagasugá; T. i. debilis, male ICN 37676, Norte de Santander, San Cayetano, vereda Ayacucho, finca El Palmar, and female ICN 24706, Amazonas, Araracuara, río Caquetá; T. arthuri, female ICN 24710, Amazonas, Araracuara, río Caquetá, and male ICN 31982, Caquetá, río Mesay. Plumage differences between ignobilis and debilis are mainly in the extent of white in throat and belly; note also the larger size of ignobilis; whereas arthuri is distinguished by its grayer underparts and duller upperparts.