Rosi was a knowledgeable and accommodating guide. She certainly knows her birds and, most importantly, the area. As we were leaving the dock, she described the plan for the tour and asked us what we wanted to see. When we answered, Roseate Spoonbill, she said other direction and turned the boat around. We saw the spoonbill. Along the way, she knew where owls were nesting and took us ashore to see them The list of birds was countless. They use a small boat so you can go into narrower channels. Rosi and her husband are nurturing their property to become a nature preserve. Far better to do this than joining the van loads from La Fortuna.