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.
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.
The Washington Bird Records Committee has accepted three records of Alder Flycatcher, all of them from the month of June: at Havillah (Okanogan County) in 2004 and again in 2006, and at Marblemount (Skagit County) in 2004.
- Olive-sided FlycatcherContopus cooperi
- Western Wood-PeweeContopus sordidulus
- Alder FlycatcherEmpidonax alnorum
- Willow FlycatcherEmpidonax traillii
- Least FlycatcherEmpidonax minimus
- Hammond's FlycatcherEmpidonax hammondii
- Gray FlycatcherEmpidonax wrightii
- Dusky FlycatcherEmpidonax oberholseri
- Pacific-slope FlycatcherEmpidonax difficilis
- Black PhoebeSayornis nigricans
- Eastern PhoebeSayornis phoebe
- Say's PhoebeSayornis saya
- Vermilion FlycatcherPyrocephalus rubinus
- Ash-throated FlycatcherMyiarchus cinerascens
- Tropical KingbirdTyrannus melancholicus
- Western KingbirdTyrannus verticalis
- Eastern KingbirdTyrannus tyrannus
- Scissor-tailed FlycatcherTyrannus forficatus
- Fork-tailed FlycatcherTyrannus savana
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