Pine Flycatcher

The pine flycatcher (Empidonax affinis) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Guatemala and Mexico. It has also been recorded as a vagrant to Arizona in the U.S.A. == Taxonomy and systematics == The pine flycatcher has these five subspecies: E. a. pulverius Brewster, 1889 E. a. trepidus Nelson, 1901 E. a. affinis (Swainson, 1827) E. a. bairdi Sclater, PL, 1858 E. a. vigensis Phillips, AR, 1942 Vocal differences have been noted on the two sides of the Isthmus of Tehuantepec so there is conjecture that more than one species is represented. == Description == The pine flycatcher is 13 to 14.5 cm (5.1 to 5.7 in) long and weighs about 11.5 g (0.41 oz). The sexes are alike. Adults of the nominate subspecies E. a. affinis have pale grayish lores and a whitish tear-shaped eye-ring that becomes a point behind the eye on an otherwise olive to grayish olive head. Their upperparts are also olive to grayish olive. Their tail is dusky. Their wings are mostly dusky, with whitish to buff tips on the coverts that show as two wing bars. The wing's secondaries and tertials have pale yellow edges.…