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southwestern willow flycatcher
(Empidonax traillii extimus) The Southwestern willow flycatcher is a late Spring and Summer breeding resident and migrates south for Fall and Winter. It inhabits riparian woodlands and thickets, associated with the presence of surface water and/or very moist soil conditions and understory vegetation. Population declines were due to urban and agricultural development, hydrologic and habitat alteration of rivers and streams, and brood parasitism by the brown-headed cowbird. It was listed as Federally Endangered in 1995, State Endangered (all subspecies) in 1990. Sweetwater Reservoir is known as a former breeding site. Recently willow flycatchers have been attempting to recolonize the upper Sweetwater Reservoir; one breeding pair was observed during the 1998 and 1999 nesting seasons.
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