Differences in genetic data between grassquits
and the various species of Darwin's finches, which were found to have similar DNA despite variations in beak size and shape, led to the conclusion that the grassquits
found their way to the Galapagos some 2 million years ago.
Examples of avian species that were observed within anthropogenic habitats and either fed, roosted, or both within villages and farms include the smooth-billed ani (Crotophaga ani), common nighthawk (Chordeiles minor), white-collared swift (Streptoprocne zonaris), Pacific hornero (Furnarius cinnamomeus), lemon-rumped tanager (Ramphocelus icteronotus), swallow tanager (Tersina viridis), blue and white swallow (Notiochelidon cyanoleuca cyanoleuca), blue-black grassquit
(Volatinia jacarina), shiny cowbird (Molothrus bonariensis aequatorialis), turkey vulture (Cathartes aura), black vulture (Coragyps atratus), cattle egret (Bubulcus ibis), and a variety of members of the Tyrannidae family (flycatchers) and Troglodytidae (wrens).