We went on the Aventuras 2000 Eco canal tour but I think most tours will be similar . Organisation was ok but the guide did not speak great English and also did not have much in depth knowledge of wildlife . The lake itself and rainforest inlets were interesting we saw a couple of capuchins who seemed to be trained for the tourists (!) leaping into the boat to take nuts. Saw a few turtles , birds , and some lizards . However for the most part the wildlife was not around and even our guide admitted that if you really want to.see and hear the jungle life a 5 or 6 am start would be better . On the way to the lake our car driver spotted a troupe of possibly howlers or spider monkeys way up in the trees which was cool . The trip to the Summit wildlife park /zoo ( sort of rescue centre ) after was underwhelming . We then decided to cut short the tour and skipped the picnic as it was very hot . I have been lucky enough to see monkeys in their natural habitat in a Belize volunteer centre so this tour was probably not for me .