This Great thick-knee was hiding among the rocks on a small islet in the river. This is a very large thick-knee (around half a meter long) with several special characteristics: a dark, slightly upturned beak with a yellow base, a green eye with a white eye band that runs down the back of the neck, framed by black fields and a gray crown. It subsists mainly on crustaceans, which it searches for by turning over stones with its strong bill. It is unfortunately decreasing in numbers and is classified as "near threatened".