We arrived in Rio Lagartos around 11 AM on a Tuesday, after 3 hours of driving from playa del carmen where we stayed. Ramon, one of Rio Lagartos Adventures' guides was on the deck and said he would take us out even with the office still closed at that point. We asked how long the tour would take and he told us whatever is best for us- from 1 hour to 2.5. It took 3... and it was amazing!! We saw every single type of bird advertised, including the roseate spoonbill, we saw huge crocodiles, and ramon was driving the boat as close as possible for the best shots, but in a very non-disturbing manner to the habitat. the best part of the trip were the salt marshes of las coloradas, where the water is all shades of pink, because of a small organism that lives in it, called artemia. this is also the preferred food of the flamingoes and therefore the place we could see them. this place is so amazing and different that it's worth doing the whole trip even without seeing the flamingoes! but boy did we see flamigoes! hundreds of them! we ended up walking on the salt flats taking pictures of them, bathing in the salty water that keeps you up on the surface without any movement, and then we smeared white mud all over ourselves- ramon showed us all the interesting places and we took amazing pictures! around 2PM as we were heading back, we saw other boats with up to 6 tourists, so our advise is to go early if you want to experience this in smaller groups.