Least Flycatcher

Empidonax minimus
Least Flycatcher specimens on display in the exhibit "Birds of D.C."

An extremely small (5 ¼ inches) flycatcher resembling several related species in the genus Empidonax, the Least Flycatcher may best be separated from its relatives not by appearance, but by its ‘che-BEK’ song. Physical field marks include a green-gray body, white eye ring, pale breast, thin bill, and white wing bars. Male and female Least Flycatchers are similar to one another in all seasons. The Least Flycatcher breeds across much of Canada and northern portions of the United States. Smaller populations occur south of this species main range at higher elevations in the Appalachian Mountains. Least Flycatchers spend the winter in south Florida, Mexico, and Central America, although identifying this species’ in much of its winter range is difficult due to its similarity to other related species. Least Flycatchers breed in open forests with deciduous trees or a mixture of deciduous and evergreen trees. This species may be found in similar habitats on migration. In its winter range, the Least Flycatcher inhabits topical forest edges and thickets. This species primarily eats insects. In northern forests in summer, Least Flycatchers are most likely to be seen darting through the canopy while gleaning insects from leaves or while catching prey in mid-air. Even when active, however, the Least Flycatcher is a difficult bird to identify. Learning this species’ song is crucial to separating it from its relatives, and silent birds are frequently impossible to identify in areas with multiple Empidonax species. Least Flycatchers are primarily active during the day, but, like many migratory songbirds, this species migrates at night.

DC Information

Uncommon breeding and transient bird, usually found in open deciduous woodland and forest edge. Migrates to this region in late April and early May, nests from early May to August, migrates south in August and September. Sexes are similar.

Specimen Information

This is possibly the record for the bird on the left.
Date:  5/12/1891
Collected By:  Wm Palmer
Locality:  Arlington, VA
Sex:  Female 
Catalog ID:  236340
 
The bird on the right is probably this male.
Date:  9/15/1910
Collected By:  Edward J Brown
Locality:  Washington, DC
Sex:  Male
Catalog ID:  221454

Distribution Map

distribution map for this species

Bird Vocalizations

Sound from xeno-canto. XC31211 Empidonax minimus (Least Flycatcher)

Sound from xeno-canto. XC11472 Empidonax minimus (Least Flycatcher)

Sound from xeno-canto. XC11473 Empidonax minimus (Least Flycatcher)

Images