John A. Gwynne (American, 20th century), “Open Country Hawks of Central Brazil”, Zone-tailed Hawk (Buteo albonotatus), Swainson’s Hawk (Buteo swainsoni), White-tailed Hawk (Geranoaetus albicaudatus), Pencil, watercolor and gouache on paper, 2006, On loan from the collection of Dr. Michael and Elyn Stubblefield