There are lots of varieties of flycatchers, according to allaboutbirds.org, and I think this one might actually be a Willow Flycatchers . They are brownish-olive birds that are best known for their voice. Look for them singing their distinctive song on top of willows and other shrubs in early summer just after they arrive from Central and South America where they spend the winter. Although they’re common across the United States, the Southwestern subspecies is federally endangered.
"Flycatcher" is an original 6"x6" oil painting on ⅛" gesso panel and is available, unframed, for $100 in my Etsy shop here.