Marble-faced Bristle Tyrant

The marble-faced bristle tyrant (Pogonotriccus ophthalmicus) is a species of passerine bird in the family Tyrannidae, the tyrant flycatchers. It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela. == Taxonomy and systematics == The marble-faced bristle tyrant was originally described as Pogonotriccus ophthalmicus. That genus was later merged into genus Phylloscartes. Beginning in 2016 taxonomic systems resurrected Pogonotriccus for this species and a few others. The marble-faced bristle-tyrant has three subspecies, the nominate P. o. ophthalmicus (Taczanowski, 1874), P. o. ottonis (Berlepsch, 1901), and P. o. purus (Todd, 1952). P. o. ottonis had been treated as a separate species by some early authors. == Description == The marble-faced bristle tyrant is about 11.5 to 12 cm (4.5 to 4.7 in) long and weighs 10 to 11 g (0.35 to 0.39 oz). The sexes have the same plumage. Adults of the nominate subspecies have a slate-gray crown, white lores, and a white supercilium on an otherwise gray and white grizzled face. Their ear coverts are white to very pale yellow with a black crescent at the rear. Their back and rump are bright yellow-olive. Their wings are dusky with pale olive-yellow to yellow edges on the flight feathers. Their wing…