Giant coot coot, the giant coot is monogamous and the pair builds a huge nest in a highland lake. However, unlike the horned coot, the nest of the giant coot is primarily made of aquatic vegetation and – as it is fiercely territorial – it never forms colonies. Giant coot The giant coot ("Fulica gigantea") is a species of coot from South America. It is found at lakes in the altiplano from central Peru, through western Bolivia, to north-eastern Chile and extreme north-western Argentina. With a total length of 48–64 cm (19–25 in), it is the second largest extant member of the
Horned coot Horned coot The horned coot ("Fulica cornuta") is a species of bird found in the Andes of South America. It was described by Bonaparte in 1853 based on a specimen collected in Bolivia. For a long time it was known only from the type specimen. Horned coot males average a little larger than the female. With a total length of 46–62 cm (18–24 in) and a reported body mass from , it averages slightly smaller than the related giant coot as the second largest coot and the third largest extant species of rail. While most coots have a horny shield