Zimmerius acer
The Guianan Tyrannulet (*Zimmerius acer*) is a diminutive and often inconspicuous member of the diverse tyrant flycatcher family (Tyrannidae), endemic to the Guiana Shield region of northern South America. Measuring approximately 9-10 cm (3.5-4 inches) in length and weighing a mere 6-8 grams, this charming passerine exhibits a subtly elegant plumage. Its upperparts are a dull olive-green, contrasting with a pale yellowish underbelly, and it is distinguished by two faint yellowish wing-bars an...
Primarily inhabits humid lowland and submontane evergreen forests, forest edges, clearings, and mature secondary growth, typically from sea level up to around 1,000 meters (3,300 feet) in elevation.
Primarily insectivorous, feeding on small beetles, flies, spiders, and other arthropods gleaned from foliage or snatched in short aerial sallies; occasionally consumes small berries or fruits.
The Guianan Tyrannulet is a diurnal and highly active insectivore, constantly on the move, gleaning small arthropods from leaves and twigs in the canopy and subcanopy. It frequently joins mixed-species foraging flocks, moving with them through the forest, benefiting from collective foraging effic...
The Guianan Tyrannulet is a resident species restricted to the Guiana Shield region of northern South America. Its distribution spans eastern Venezuela, Guyana, Suriname, French Guiana, and northeastern Brazil (north of the Amazon River, primarily in the states of Roraima, Amapá, and northern Par...
Least Concern
- Despite its common name, its scientific name *acer* (meaning sharp or pointed) might refer to its relatively fine bill or its sharp, insistent vocalizations. - It is one of the smallest members of the enormous Tyrannidae family, which boasts over 400 species, making it the largest bird family i...