From all the owls that I've seen in Kabalebo, the Tawny-bellied Screech Owl is the silent one. All the other owls I've heard calling but this one never gave a sound. But on the other hand they are territorial and have a certain spot where they hide and rest during the day. The first hide out wasn't a great pick as there is a tree nearby where guides and tourists were hitting a telephone tree just for the sound. This of course made sure that this Screech Owl went looking for a different hide out and found one, not very far from its original spot.
But since it is a smart bird, this time it pick a tree that is not right next to the trail and you have got to know which tree you have to look at.