During our visit to the wonderful Casa Serena in the Balcones de Majagual we were able to see the resident troop of Howler Monkeys making their way through the valley. They were vocal enough that we could hear them on the neighboring hill at dusk but on our way out we were able to get some great views. This was the first time seeing the very noisy monkeys for my wife. The mom and little one were relaxing for a minute before moving on with the rest of the troop.