Golden-fronted Greenlet

The golden-fronted greenlet (Pachysylvia aurantiifrons) is a small passerine bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Panama, Colombia, Venezuela, and Trinidad. == Taxonomy and systematics == The golden-fronted greenlet was originally described in 1861 as Hylophilus aurantiifrons. The golden-fronted greenlet has three subspecies, the nominate P. a. aurantiifrons (Lawrence, 1861), P. a. helvina (Wetmore & Phelps, WH Jr, 1956), and P. a. saturata (Hellmayr, 1906). In the early twentieth century what is now the dusky-capped greenlet (P. hypoxantha) was also included as a subspecies. The golden-fronted and rufous-naped (P. semibrunnea) greenlets are sister species and form a superspecies. == Description == The golden-fronted greenlet is 11 to 12 cm (4.3 to 4.7 in) long and weighs an average of 9.5 g (0.34 oz). The sexes have the same plumage. Adults of the nominate subspecies have an ochre-olive forehead and a buffy brown crown. Their upperparts are greenish brown that is more yellowish green on the rump. Their wings' coverts are greenish brown and their primaries and secondaries are dull blackish gray with thin greenish edges on the outer webs. Their tail is dull olive-green. Their chin and throat are whitish buff, their breast…