A mysterious creature

Earlier this morning, before the cow herd incident, Kevin went down to open the gate to the ponds to allow fresh river water through the aqueduct system, as per his daily routine. Trout need cold, oxygenated water to grow healthily. If the water is too warm, they die. If the water is too stagnant, they die. If the water is too dirty, they die. So, this time of year, with the sediment flushing through from the heavy rain, it's a delicate balance between all three. Kevin has it  almost down to a science now. Since writing about the two dead fish, we've not had any more casualties. And we've noticed the survivors have gotten bigger in the last three weeks. They will be ready to catch and eat come January. While Kevin was down at the far end of the property, he saw a mysterious creature. He said it was the size of a raccoon with a pointy nose, jet black, very agile with a long monkey tail. This creature jumped from the ground to the aqueduct wall then up the forest hillside with ease. Kevin described it to Rolando, but Rolando has no idea what it could be. It didn't sound like anything he's come across or seen in books. Kevin is convinced it wasn't a big cat, and monkeys don't live this far up the mountain range, so we'll keep our eyes peeled and carry our camera in case it comes back. Kevin may have discovered a brand new species... it is Costa Rica, afterall :)