A Grass wren (also called Páramo wren), closely related to the Sedge wren in the USA (Cistothorus stellaris), sat on a rock, close to a brook on the páramo. (Both species have previously been called "Sedge wren" and were considered to be one and the same species. Nowadays, they constitute two distinct species. However, several researchers now argue that this division is not enough, but that the Grass wren should be divided into at least three species. In any case, this particular wren belongs to the subspecies aequatorialis, found in southern Colombia and in Ecuador.) In spite of its wide distribution, Grass wrens are relatively unknown. We know that they have a great repertoire of calls and songs, that they are insectivores, that this species probably is sedentary and occurs up to 4,000 meters above sea-level. It is generally considered to be difficult to spot, because it moves in the grass, much like a mouse, but, as in this case, when the reproductive season begins, the male often sings from a slightly elevated position and thus reveals itself.