Dusky-capped Greenlet

The dusky-capped greenlet (Pachysylvia hypoxantha) is a species of bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela. == Taxonomy and systematics == The dusky-capped greenlet was originally described in 1868 as Hylophilus hypoxanthus. For a time early in the twentieth century it was considered a subspecies of the golden-fronted greenlet (P. aurantiifrons) but beginning in the 1930s it attained its status as a full species. The dusky-capped greenlet has these six subspecies: P. h. hypoxantha (Pelzeln, 1868) P. h. fuscicapillus (Sclater, PL & Salvin, 1880) P. h. flaviventris (Cabanis, 1873) P. h. icterica (Bond, J, 1953) P. h. albigula Chapman, 1921 P. h. inornata Snethlage, E, 1914 Some mid-twentieth century authors treated P. h. inornata as a subspecies of the brown-headed greenlet (Hylophilus brunneiceps). Subspecies P. h. flaviventris was described as a full species and often treated that way until the mid-twentieth century. == Description == The dusky-capped greenlet is 11.5 to 12 cm (4.5 to 4.7 in) long and weighs about 17 g (0.60 oz). The sexes have the same plumage. Adults of the nominate subspecies P. h. hypoxantha have a dull olive-brown forehead, crown, and…