Plumage descriptions and morphometric measurements were obtained from adult and juvenile Rufous
Treecreepers of both sexes. Plumage characteristics differed between the sexes in adults and juveniles, and
between adults and juveniles of the same sex. T he main plumage differences between adults and juveniles were
the overall darker coloration of the juvenile plumage and the variation in upper breast pattern. Males and females,
and adults and juveniles (of the same sex) also exhibited significant size dimorphism in a number of morphometric
characters.
