Chauna chavaria; Print; The northern screamer (Chauna chavaria); also known as the black-necked screamer; is a large species of bird in the small family Anhimidae; the screamers. It is a resident breeder in northern Colombia; in Choc? Antioquia; C髍doba; Sucre; Bol韛ar; Magdalena; Santander; and Cesar Departments and northwestern Venezuela; in Zulia; M閞ida; and Trujillo States. On average; they are 88.9 cm (35 in) long and weigh about 3.9 kg (8.6 lb).; 1700-1880