About Myiobius atricaudus Lawrence, 1863
The black-tailed myiobius (Myiobius atricaudus Lawrence, 1863) closely resembles the whiskered myiobius (M. barbatus) and the sulphur-rumped myiobius (M. sulphureipygius) in overall appearance: all three species have olive upperparts and a yellow rump. The black-tailed myiobius can be distinguished by its underparts, which are buff rather than tawny or greyish-olive; individuals in eastern Brazil typically have yellowish or yellowish-buff underparts instead. A further distinguishing factor is its habitat and behavior. The black-tailed myiobius occurs at altitudes up to 1,400 m (4,600 ft), and favors woodland edges and secondary forests, being less active and acrobatic than the other two species. This species has a patchy distribution across tropical Central and South America. It can be found in Costa Rica, Panama, Colombia, Venezuela, Ecuador, Peru (on both sides of the Andes), and large areas of Brazil. Where its range overlaps with that of the whiskered myiobius, the black-tailed myiobius generally occupies drier habitats at higher elevations. It typically frequents forest verges and secondary growth, often near water, while the whiskered myiobius prefers the interior of forests.
