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Pardusco Nephelornis oneilli

  • Order: Passeriformes
  • Family: Thraupidae
  • Monotypic
  • Authors: Capparella, Angelo P. and Christopher C. Witt
Sections

Appearance

Distinguishing Characteristics

A small brownish bird with a small, straight bill that has a pointed tip and slightly arched culmen. Pardusco is a proper noun derived from the Spanish adjective pardusco, meaning dark brown.

Similar Species

Pointed versus hooked bill separates it from any female or juvenile flowerpiercers (Diglossa) that are of similar size and plumage (Ridgely and Tudor 1989, Schulenberg et al. 2007).

Detailed Description

Described in detail in the original description (Lowery and Tallman 1976). Adult overall brown with an indistinct wing bar formed by ochraceous-tawny edgings on greater coverts. Plain face with very faintly paler eye-ring. Underparts tawny-olive to ochraceous-tawny becoming paler on the throat and slightly darker on flanks and undertail coverts. Immature slightly darker than adult. The remiges and rectrices are darker brown with tawny-olive and light brownish olive edgings, respectively. The adult plumage is shown in paintings that appear in Clements and Shany (2001), Fjeldså and Krabbe (1990), Isler and Isler (1987), Ridgely and Tudor (1989), and Schulenberg et al. (2007).  The subadult plumage is shown in Isler and Isler (1987). The species is sexually dimorphic only in size, with females slightly smaller than males by measurements and body mass (Lowery and Tallman 1979); see also Measurements.

Molts

No information.

Bare Parts

Irides brown, maxilla dark brown or horn colored, mandible flesh-colored, tarsi light brown, and toe pads yellowish (Lowery and Tallman 1976).

Measurements

Extensive morphometric measurements are reported in Lowery and Tallman (1976). Body masses are reported as 17.5 g for males (S.D. 0.94; range 16.0-19.0; n=15) and 14.9 g for females (S.D. 0.68; range 13.5-15.5; n=13). This accords well with the masses of the one male (17.3 g) and one female (15.3 g) reported by Witt and Lane (in press).

Recommended Citation

Capparella, Angelo P. and Christopher C. Witt. 2009. Pardusco (Nephelornis oneilli), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, editor). Cornell Lab of Ornithology, Ithaca, New York, USA. https://doi.org/10.2173/nb.pardus2.01