Species Profile
Willow Flycatcher
Empidonax traillii
Quick Facts
Conservation
LCLeast ConcernAlso known as: Traill's Flycatcher, Little Willow Flycatcher, Southwestern Willow Flycatcher
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Appearance
The Willow Flycatcher is a small bird, though relatively large among Empidonax flycatchers. It's olive-brown above with a pale yellowish belly and two whitish-gray wing bars.
It has a slightly crested head, dark eyes, and a wide bill that's dark above and yellow-orange below. The white throat contrasts with a dull olive-brownish breast band.
Juveniles closely resemble adults but have buffier wing bars and more yellowish undersides. Males and females appear identical, though they can be distinguished during breeding season through close examination.
Identification & Characteristics
Colors
- Primary
- Brown
- Secondary
- White
- Beak
- Black
- Legs
- Black
Attributes
Understanding Attributes
Rated 0–100 based on research and observation. A score of 50 is average across all bird species. These attributes are relative and don't necessarily indicate superiority.
Habitat & Distribution
Willow Flycatchers inhabit moist, shrubby areas near water, including willow thickets, alder groves, and streamside bushes. They are found across North America, from Alaska to the eastern United States and south to Mexico.
During the breeding season, they are widely distributed across the US and southern Canada. In winter, they migrate to Central America and northern South America, with some populations reaching as far as Ecuador.
Distribution
Diet
Willow Flycatchers primarily feed on flying insects, including flies, beetles, and moths. They catch prey in mid-air with quick, agile flights from their perches.
During migration and in winter, they may supplement their diet with small berries and fruits.
Behaviour
Willow Flycatchers are known for their 'sit-and-wait' hunting strategy, perching on exposed branches and making short flights to catch insects. They often return to the same perch after catching prey.
During the breeding season, males become territorial and engage in aerial chases to defend their nesting areas.
Calls & Sounds
The Willow Flycatcher's song is a distinctive, sneezy 'fitz-bew' or 'fitzbew'. This vocalization is crucial for species identification, as it differs from the similar-looking Alder Flycatcher.
They also produce a soft 'whit' call and a more emphatic 'whitt' when agitated.
Nesting & Breeding
Breeding season for Willow Flycatchers typically begins in late May to early June. Males arrive at breeding grounds first and establish territories, attracting females with their distinctive songs.
Nests are cup-shaped structures made of grass, bark strips, and plant fibers, usually placed in the fork of a small tree or shrub near water. Females lay 3-4 creamy white eggs with brown spots.
Incubation lasts about 13-14 days, primarily done by the female. Both parents feed the nestlings, which fledge after about 14 days. Pairs often raise two broods per season in some regions.
Conservation
While listed as Least Concern globally, some subspecies of the Willow Flycatcher face significant threats. The Southwestern Willow Flycatcher is endangered due to habitat loss and degradation of riparian areas.
Conservation efforts focus on protecting and restoring wetland and riparian habitats.
Birdwatching Tips
- Listen for their distinctive 'fitz-bew' call, especially in early summer
- Look for them perched on exposed branches near water or in shrubby areas
- Observe their quick, darting flights as they catch insects
- In the US, focus on riparian areas and wetlands during breeding season (May-August)
Did You Know?
- Willow Flycatchers can snap their bills shut with enough force to produce an audible 'click' when catching insects.
- They are one of the latest spring migrants, often not arriving on breeding grounds until June.
- The Southwestern Willow Flycatcher subspecies is highly endangered, with fewer than 1,000 pairs remaining.
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