Conopias trivirgatus berlepschi

Belongs to the diverse family Tyrannidae and is characterized by its slender profile and medium-sized build, measuring between 13.5 and 14.5 centimeters in total length, with an average body mass ranging from 11 to 14 grams. Its upper plumage exhibits a uniform dark olive-green coloration covering the back, rump, and wing coverts, contrastingly paired with bright yellow underparts that extend seamlessly from the throat down to the undertail coverts. The most striking diagnostic feature of this taxon is its facial pattern, which consists of a dark crown bordered by a conspicuous white supercilium that begins at the base of the bill and wraps around to meet at the nape, creating a partial collar, complemented by a distinct black transocular stripe. Its bill is black, relatively long, sturdy, and features a small terminal hook adapted for capturing aerial prey, lacking any prominent wing bars or pale feather edgings.

Geographical distribution: Distributed in a highly disjunct manner across the South American continent, divided into two distinct geographic populations corresponding to recognized subspecies. The northern and western population, representing Conopias trivirgatus berlepschi, is found throughout the Amazon Basin, spanning regions of eastern Ecuador, eastern Peru, northern Bolivia, southern Venezuela, and northern Brazil. Conversely, the nominate subspecies, Conopias trivirgatus trivirgatus, is restricted to the Atlantic Forest biome of eastern and southeastern Brazil, extending into eastern Paraguay and reaching its southernmost limit in northeastern Argentina, specifically in the province of Misiones.

Habitat: Occurs almost exclusively within the upper canopy of lowland evergreen forests, showing a strong preference for mature, undisturbed woodland environments. In the Amazonian region, it is closely associated with terra firme forests and transitional zones near flooded forests or várzea, as well as mature secondary forest edges. In the southern portion of its range, within the Paranaense and Atlantic forest biomes, it favors dense humid forests on both lowlands and montane slopes, generally ranging up to 950 meters above sea level, where tall emergent trees provide the necessary vertical structure for its daily activities.

Feeding: Possesses an predominantly insectivorous diet, specializing in capturing prey within the highest strata of the forest vegetation. Its diet consists of a wide variety of arthropods, including beetles, wasps, flies, dragonflies, and caterpillars found on canopy foliage. To secure its food, it utilizes active foraging techniques such as sally-gleaning and short aerial pursuits, snatching insects directly from leaves or intercepting them in mid-air with rapid, acrobatic maneuvers. It opportunistically supplements this insect diet with small berries and wild fruits from epiphytes and canopy trees, particularly during the dry season or when insect populations decline.

Behavior: Highly active and conspicuous, this species is typically observed moving in pairs or small family groups through the forest canopy. It is a regular and energetic member of mixed-species foraging flocks, associating with other tyrant flycatchers, tanagers, and canopy specialists to improve foraging efficiency and predator detection. Its presence is often first revealed by its vocalizations, which consist of series of rapid, high-pitched, dry chattering trills, which are harsh yet melodic and delivered frequently while hopping between high branches. It maintains an upright posture when perched, frequently scanning the surrounding foliage with quick head movements.

Nesting: Exhibits a specialized reproductive strategy for its family, relying on the availability of pre-existing cavities located in dead tree trunks or high branches, typically more than 12 meters above the forest floor. It frequently occupies old nesting holes abandoned by woodpeckers (family Picidae) or natural hollows created by wood decay. Within these cavities, the pair constructs a cup-shaped nest lined with fine plant fibers, rootlets, dry leaves, and moss. The female lays a clutch of two to three cream-colored eggs speckled with brown markings, which are incubated by both parents, who also cooperatively share the duties of feeding and vigorously defending the nestlings from canopy predators.

Conservation status: Classified globally as Least Concern (LC) on the IUCN Red List of Threatened Species. Although it boasts a vast global range, populations within the Atlantic Forest region face significant pressure from habitat loss, driven by severe deforestation, forest fragmentation for agricultural expansion, and selective logging, which critically reduces the abundance of mature, hollow-bearing trees essential for its nesting requirements.