The Surprising Song of the Spot-winged Wood-quail

This sound really took me by surprise. It was unlike anything I was used to and at first I even wondered if it was a primate.
But investigation and tools gave me the answer: Spot-winged Wood-quail (Odontophorus capueira capueira), locally called uru or uru capoeira.
By listening to the recording one can imagine a few of them distributed in space which is accurate with the observed behaviour: usually singing in duos and responding to other groups. Despite this vocal capacity they are small (up to 24 cm). They belong to the gallinaceous group, nest and feed from the ground.
It’s the end of the afternoon, close to 7pm, but the forest always gets darker faster. You can also hear a Common Potoo, or Urutau (Nyctibius griseus) and the atmosphere steadily melting into the night.

This was recorded by an ancient fig tree, standing at the smudged frontier of second growth and native forest.