Well, around 4a.m., anyway. The Baboon troupe are spending their nights close by, just in the fringes of the forest. Baboons are diurnal creatures like us, and they tend to stick to a safe sleeping-place for a while before moving on.
Last night there was a huge shouting match between the alpha, his sidekick and some other creature. A Leopard hunting them? Very likely, since there is a resident Leopard in the area. We've often heard the Baboons screeching in the night in the past, and it usually result in them moving off into another part of the forest if they feel insecure here. Last night was the first time that we've heard noise from their nemesis - a low, "hhhnnnh, hhhhnnnh". Calling it a "coughing" or "grunting" noise would be totally inaccurate, but the closest word we have in English. I surmised it was the Leopard, until I heard a crash! A tree, or very large branch breaking. Not a breath of wind.