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The juvenile plumage, systematic position, and range of Synallaxis macconnelli Chubb (Aves, Furnariidae)

Mees, G.F. 1987.
The juvenile plumage, systematic position, and range of Synallaxis macconnelli Chubb (Aves, Furnariidae).
Proceedings van de Koninklijke Nederlandse Akademie van Wetenschappen, Series C, Biological and Medical Sciences, 90: 303–309.

Abstract

It was expected that the previously undescribed juvenile plumage of Synallaxis macconnelli would be similar to the quite distinctive juvenile plumages of the closely related species S. cabanisi and S. moesta. However, it is strikingly different, and resembles the species’ adult plumage.

S. macconnelli consists of two geographically separated populations: one in the highlands of southern Venezuela, with an altitudinal range of 1000–1900 m, and one in the lowlands of Suriname, French Guiana, and adjacent northern Brazil, ranging from sealevel to 700 m. Tentatively, these are recognized as 2 subspecies: S. m. macconnelli in the highlands, S. m. obscurior in the lowlands, but the differences are slight, and the validity of obscurior requires confirmation.

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