Note: little/no eye ring, contrasting white throat, and all pale lower mandible.
  • Note: little/no eye ring, contrasting white throat, and all pale lower mandible.

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Willow Flycatcher

Empidonax traillii
Passeriformes
Members of this diverse group make up more than half of the bird species worldwide. Most are small. However their brains are relatively large and their learning abilities are greater than those of most other birds. Passerine birds are divided into two suborders, the suboscines and the oscines. Oscines are capable of more complex song, and are considered the true songbirds. In Washington, the tyrant flycatchers are the only suboscines; the remaining 27 families are oscines.
Tyrannidae
Unlike most passerines found in North America, flycatchers are suboscines. Suboscines have a simpler syrinx (voice box) than the oscines (songbirds), and hence have less-developed and less-elaborate songs. Their song is innate, and does not contain a learned component. The flycatchers are the only suboscine passerines found in North America north of Mexico. Nearly all suboscines (and all Tyrannidae) are native to the New World, and they are much more numerous in the tropics, where several other families occur in addition to the Tyrannidae. Flycatchers are named for their foraging style. They sit quietly on a perch and dart out to grab a flying insect from the air, and then return to their perch to wait for the next meal to fly by. Many also forage by hovering next to foliage or over the ground. Most have a distinct, upright posture and a slight crest. They have small feet as they do not typically walk or run on the ground. Most flycatchers are monogamous. The female generally builds the nest, incubates the eggs, and broods the young, although both parents feed the young. Flycatchers of the genus Empidonax pose many identification challenges for birders. Range, habitat, vocalizations, and behavior must all be taken into account to distinguish between members of this group.
Common summer resident.
  • Species of Concern
  • Sound To Sage

General Description

The Willow Flycatcher is one of the largest flycatchers in the genus Empidonax, with a relatively flat forehead and distinct peak on the rear of its crown. It is gray in color, with buffy or light-gray wing-bars and an almost invisible white eye-ring. The lack of visible eye-ring helps distinguish it from the other Empidonax flycatchers. It has a pale breast and white throat, and the base of the lower mandible is yellow. Its bill is broad with a pale lower mandible and a long, broad, straight-sided tail.

Habitat

This aptly named bird is found in willow thickets and other brushy areas near streams, marshes, or other wetlands, and in clear-cuts and other open areas with nearby trees or brush.

Behavior

Willow Flycatchers typically forage in the shrub layer, or in low trees. They watch from a perch, fly out to grasp prey in quick darts, and return to the perch. They also glean prey from twigs and branches as they hover in the foliage.

Diet

Insects, especially flying insects, are the most common prey.

Nesting

The male sings to defend his territory, although the female has been known to sing as well. The female builds a low nest in a willow, bracken fern, or rose. The nest is usually an open cup of grass and bark, lined with soft plant down and other material. Sometimes strips of plant material hang from the bottom of the nest. The female incubates three eggs for 13 to 14 days, and both parents help feed the young. The young take their first flights at 13 to 15 days, but often remain near the nest for three or four more days, and continue to follow their parents around the territory until they are 24 to 25 days old. The short breeding season allows for only one clutch a year.

Migration Status

Willow Flycatchers winter in the Amazon Basin and are one of the latest birds to arrive in Washington in the spring. It is often the end of May before they are back on their breeding grounds. They head south in early fall, leaving Washington in late August or early September.

Conservation Status

This species has declined in some areas due to loss of streamside habitat, and the US Fish and Wildlife Service lists the southwestern population as a subspecies-of-concern. Willow Flycatchers in Washington experienced significant declines from 1966 to 1979, according to the Breeding Bird Survey. During the period between 1980 and 2000, the species still suffered a decline, but to a lesser degree, indicating that there may be a reversal of the trend, or at least stabilization, in the years to come. Despite their decline, Willow Flycatchers are still very common in western Washington. They are less common and more locally distributed east of the Cascades. River-corridor channelization, overgrazing, dam construction, and urbanization all degrade Willow Flycatcher habitat. With the listing of many Northwest salmon populations under the Endangered Species Act, many rivers are undergoing restoration to improve the habitat for salmon, which should also improve habitat for Willow Flycatchers and other riparian species.

When and Where to Find in Washington

Willow Flycatchers are common in appropriate habitats such as clear-cuts, to elevations of at least 3,000 feet on both sides of the Cascades. They are rare along the outer coast and uncommon on the western side of the Olympic Peninsula. Migrants and non-breeders are sometimes seen in the Columbia Basin.

Click here to visit this species' account and breeding-season distribution map in Sound to Sage, Seattle Audubon's on-line breeding bird atlas of Island, King, Kitsap, and Kittitas Counties.

Abundance Code DefinitionsAbundance

C=Common; F=Fairly Common; U=Uncommon; R=Rare; I=Irregular
EcoregionJanFebMarAprMayJunJulAugSepOctNovDec
Oceanic
Pacific Northwest Coast UUUUU
Puget Trough UCCCU
North Cascades UCCFR
West Cascades RCCCF
East Cascades RUUUU
Okanogan RCCCR
Canadian Rockies FFFF
Blue Mountains UFFFU
Columbia Plateau UFFFF

Washington Range Map

North American Range Map

North America map legend

Federal Endangered Species ListAudubon/American Bird Conservancy Watch ListState Endangered Species ListAudubon Washington Vulnerable Birds List
Yellow ListEarly Warning

View full list of Washington State's Species of Special Concern