From Lost Borneo blog:
One of the most popular day tours for tourists to Kota Kinabalu is the River Safari Tour.
For those who can’t make it to the East Coast of Sabah, the River Safari gives visitors to Kota Kinabalu the best chance to see wildlife in its natural surroundings. The tour starts around 2pm when tourists are picked up from their hotel for a 2-hour car ride to a river jetty.
The river cruise begins from about 4.30pm and lasts until the sun sets and the sky turns dark. During the evening cruise, the main attraction will be the proboscis monkey, a primate with a huge pendulous nose found only in Borneo. At night, the attention turns to the beautiful lights of the fireflies that dot the trees by the river side. It is one of the best day tours in Kota Kinabalu and should not be missed.
What few tourists know though is that there are actually 3 rivers that are currently being used by tour operators and while all 3 rivers offer almost the same thing, that is proboscis monkeys and fireflies, in truth, they are very different, and would affect how much the tourists enjoy the tour, depending on what they would like to see most.
Almost all tour operators never specify the name of the river that they are going to, and even if they do name the river, you might actually be taken to a different place instead. So, it is very important that you INSIST on where you want to go if you have a particular river in mind.
Continue reading (incl. pics) at: Sabah River Safari - Garama, Klias or Weston?