I’ve heard people call Willets (Tringa semipalmata) “Plain Brown Birds”, I reckon they may have never seen one looking like this Willet.
Yes, Willets have brown in their plumage but they are far from “Plain”. In fact; with their wings lifted, they look pretty dapper in my opinion.
I photographed this Willet on Antelope Island State Park in northern Utah, the bird had briefly perched on a rock and then flew a short distance to the top of this shrub where for few moments it struggled to regain its balance and showed the snazzy underside of the wings.
A “Plain Brown Bird”? Pfflllt…