Pirre Chlorospingus

The Pirre chlorospingus is about 15 cm (5.9 in) long and weighs 20 to 36 g (0.71 to 1.3 oz). The sexes have the same plumage. Adults have a dark gray crown and face. Their nape and upperparts are olive-green. Their flight feathers are dusky with dark green edges on the outer webs of the primaries and wider olive edges on the secondaries; the tertials are mostly olive. The central tail feathers are dusky; the rest are dusky with increasing amounts of olive on their edges to the outermost. Their throat is yellowish white and their upper breast, sides, and flanks are darker olive-yellow. The middle of their lower breast, their belly, and their undertail coverts are yellow. Both sexes have a whitish to pale orange-yellow iris, a black bill, and slaty gray to fuscous black legs and feet.

The Pirre chlorospingus is found in extreme eastern Darién Province in Panama near the Colombian border. It is best known from Cerro Pirre (or Cerro Pirri), where the type specimen was collected, Cerro Sapo, and the Serranía de Jungurudó. There are also a few eBird records from Cerro Mecana in Colombia's west-central Chocó Department. However, the South American Classification Committee has no records in that country and major taxonomic systems also do not recognize it there. The Pirre chlorospingus inhabits the canopy and edges of montane evergreen forest and also elfin forest in the upper tropical and subtropical zones. It favors stands of bamboo and vine tangles. It elevation it ranges from 800 to 1,650 m (2,600 to 5,400 ft).

The Pirre chlorospingus feeds on fruits and small arthropods. It typically forages in small groups of up to six individuals and regularly, but not exclusively, joins mixed-species feeding flocks. It forages mostly from the forest's mid-level to its canopy, seeking food on mossy branches, in fern clusters, and among leaves. It often hangs upside-down while searching.