We were surprised at how much wildlife we saw on this hike at Arenal Hanging Bridges. We did not have a guide, but other people helped point out the wildlife, which included a sloth very near the bridge, howler monkeys, a green vine snake slithering up close, many birds, leaf-cutter ants, etc. The scenery and views from the bridges are spectuacular. The wildlife exceeded our expectations for a short walk in the rain forest.