Horned Coot males average a little larger than the female.

The most complex frontal shield is found in the Horned Coot.

The Horned Coot is monogamous, and sometimes breeds in colonies of up to 80 pairs.

While most coots have a horny shield on the forehead, the Horned Coot has three wattles in both sexes.

Unlike the Giant Coot, the legs of the Horned Coot are dull greenish.

The base of the Horned Coot's enormous nest is a mound built of stones, gathered one at a time by the pair, using their beaks.

There are about 80 other bird species present, including the Horned Coot, Andean Goose and Andean Hillstar.

Fulica cornuta - Horned Coot (Argentina, Bolivia, Chile)

As in the related Horned Coot, the Giant Coot is monogamous and the pair builds a huge nest in a highland lake.

The Horned Coot (Fulica cornuta) is a species of bird found at lakes in the altiplano of north-western Argentina, south-western Bolivia, and north-eastern Chile.

Others, such as Andean Goose, Horned Coot, Andean Gull, Puna Tinamou and the three flamingo species inhabiting in Chile, are considered vulnerable.

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.

The lake is a place to discover birds like Andean Avocet, Andean Lapwing, Cattle Egret, Horned Coot, Puna Teal, Ruddy Duck and Yellow-billed Pintail.

This portion of the reserve is home to a variety of birds, including Andean Flamingo, Chilean Flamingo, Horned Coot, Silvery Grebe, Andean Gull and Greenish Yellow Finch.

The Horned Coot (Fulica cornuta) is a species of bird found at lakes in the altiplano of north-western Argentina, south-western Bolivia, and north-eastern Chile.