red-eyed vireo: of northern North America having red irises and an olive-grey body with white underparts
vireo: any of various small insectivorous American birds chiefly olive-grey in color
major depressive episode: (psychiatry) a state of depression with all the classic symptoms (anhedonia and lethargy and sleep disturbance and despondency and morbid thoughts and feelings of worthlessness and sometimes attempted suicide) but with no known organic dysfunction