About Polioptila albiloris P.L.Sclater & Salvin, 1860
The white-lored gnatcatcher (Polioptila albiloris P.L.Sclater & Salvin, 1860) measures 11 to 12 cm (4.3 to 4.7 in) long and weighs 6 to 9 g (0.21 to 0.32 oz). For the nominate subspecies, breeding males have a black cap that extends down to the eyes and includes the nape. The rest of the nominate breeding male's upperparts are bluish gray. Its tail is black with white outermost feathers. Its throat is white, which transitions to pale bluish gray on the breast and flanks. Females have a dark gray cap, along with the species' characteristic white lores and supercilium. Juveniles resemble females but have browner upperparts. Males of the subspecies P. a. vanrossemi have a larger black cap, and longer wings and tail, than the nominate subspecies. The nominate subspecies is distributed from central Guatemala south through Honduras, El Salvador, and Nicaragua into northwestern Costa Rica. P. a. vanrossemi occurs in Mexico, ranging from the southern parts of the states of Michoacán, México, and Puebla south to most of Chiapas. This species lives in arid to semi-arid biomes, which include scrublands, thorn forest, deciduous woodland, and secondary forest. It avoids the interior of tall woodlands. It is mostly found at elevations below 1,000 m (3,300 ft).
