As if echoing it, a similar cry follows, coming from the opposite direction. Others answer these, from higher up, towards the road, then still others, from the low ground.

Sometimes the sound is a little lower, or more prolonged. There are probably different kinds of animals. Still, all these cries are alike; not that the common characteristic is easy to decide, but rather their common lack of characteristics: they do not seem to be cried out of fright, or pain, or intimidation, or even love. They sound like mechanical cries, uttered without perceptible motive, expressing nothing, indicating only the existence, the position and the respective movements of each animal, whose trajectory through the night they punctuate.