Euscarthmus rufomarginatus
The Rufous-sided Scrub Tyrant (Euscarthmus rufomarginatus) is a small, active passerine of the Tyrannidae family, distinguished by its delicate build and vibrant rufous flanks. Measuring approximately 10.5-11.5 cm (4.1-4.5 in) in length and weighing a mere 7-9 grams, this diminutive bird sports an olive-green back, a whitish throat and belly that transitions to pale yellowish on the vent, and a noticeable pale eye-ring. Its most striking field mark, the rich rufous coloration on its sides, gi...
Found in dry to semi-humid scrublands, savannas, cerrado, Chaco, and the edges of woodlands. It typically inhabits areas with dense, low vegetation, occurring at elevations generally below 1000 meters (3,300 feet).
Feeds almost exclusively on small insects and other arthropods, including beetles, spiders, and caterpillars. It primarily forages by gleaning from foliage and making short sally-gleans for aerial insects.
This diurnal species is highly active, constantly flitting and hopping through the dense, low vegetation of its scrubland habitat, often making it difficult to spot. It primarily forages for insects by sally-gleaning, launching short flights from a perch to snatch prey from leaves or the air, or ...
The Rufous-sided Scrub Tyrant is a resident species distributed across a broad band of central South America. Its primary range includes eastern Bolivia, central and eastern Paraguay, and a significant portion of south-central Brazil, extending from Mato Grosso do Sul eastward through São Paulo a...
Least Concern
- Its scientific name, *Euscarthmus rufomarginatus*, can be translated to 'beautifully slender, red-margined,' a fitting description of its delicate build and distinctive rufous flanks. - Despite belonging to the 'tyrant flycatcher' family, this species is quite shy and elusive, preferring to sta...