Zimmerius viridiflavus
The Peruvian Tyrannulet (*Zimmerius viridiflavus*) is a diminutive, highly active passerine, a true gem of the Andean cloud forests. Measuring a mere 10-11 cm (approximately 4 inches) and weighing 7-9 grams, it sports a generally olive-green plumage above, contrasting with a grayish crown and an often-conspicuous white supraloral stripe. Its underparts are a pale yellowish, complemented by two distinct yellowish wing-bars that serve as key identification marks in the field. This species belon...
This species primarily inhabits humid montane forests, cloud forests, and their edges, including secondary growth and clearings with scattered trees. It is typically found at elevations ranging from 600 to 2000 meters, though sometimes observed lower or higher.
The diet of the Peruvian Tyrannulet consists predominantly of small arthropods, including various insects and spiders, which it procures through active gleaning from leaves and short, acrobatic aerial sallies. It may also occasionally consume small berries or fruits.
The Peruvian Tyrannulet is a highly active, diurnal species, constantly on the move through the forest canopy and mid-story. It employs a foraging strategy of actively gleaning insects from foliage and making quick, agile aerial sallies to snatch flying arthropods. Individuals often join mixed-sp...
The Peruvian Tyrannulet is endemic to the humid eastern slopes of the Andes, with its primary distribution centered in Peru and extending marginally into extreme southern Ecuador. Its breeding and year-round range spans from the Cordillera del Cóndor in Zamora-Chinchipe province, Ecuador, southwa...
Least Concern
- The Peruvian Tyrannulet is one of the smallest members of the extensive Tyrannidae (tyrant-flycatcher) family, often weighing less than a quarter of an ounce. - Its scientific name, *viridiflavus*, literally means "greenish-yellow," aptly describing its subtle plumage. - Identification often re...