Most of you have probably heard of Lake Victoria at one point or another in your life. It is the largest lake in Africa and third in the world. It has become especially famous through the documentary “Darwin’s Nightmare” showing the lake’s challenges regarding the Nile perch and water hyacinth. Many many years ago I held a presentation about invasive species in Lake Victoria (that was for my UWC interview in 2005). During my first Ecology course we learned about colour selection in Cichlids and how pollution disrupts it. And now, year later, I am actually living just a 15 minute walk away from this giant pond of awesomeness.
This morning I was lucky enough to have a roommate that has to take pictures of otters to make post cards and other touristy products. I was allowed to join the otter hunt and at 6:30 am we started our boat tour. We were joined by the captain (who had brought a big bag of life jackets, fuel and the motor on his bike) and a volunteer that had helped out with otter research in this area some time ago.
The sunrise was short but pretty as always. Even before we took off I saw my first ever Hippo peeking out of the water. I was totally hippnotized by it. The lake was calm and very milky, the birds were singing, chirping, shouting and squeaking. Every time you look in a different direction there is a new species. I particularly like a yellow, abundant, bird (Village weaver) that lives in large colonies and builds round hanging nests close to the water.
We were driving around looking for otters, and found none. Instead we got to observe at least nine Hippos. It might have been more but I didn’t count the ones on the way back in case they were the same. So cool. They don’t mind people too much, which makes it quite easy to observe and photograph them.
Other than Hippos there were people on the lake. Fishermen were rowing or sailing out hoping for a lucky day. Apparently, marijuana is part of the payment they receive. Other than that we saw quite a few children using long poles to move their boats around the shore and chop branches from the trees that are standing in the water.
Carpets of water hyacinths were floating around the lake-scape. One harbour that was almost free of hyacinths in the morning was completely covered just three hours later. Once the wind changes, those hyacinths will move again. They pose a major problem to fishermen, other boat traffic and quite a few species and leads to increased risk of getting bilharzia as the hosts (snails) live in the roots. However, often not mentioned, the hyacinth has quite positive effects on a lot of smaller fish species. They are being hunted by the Nile perch and can now hide in the roots. Therefore, the otters have been doing better again, too. Nowadays, the water hyacinth is controlled by an introduced beetle. It hasn’t eradicated the plant but decreased it to more manageable levels.
After four hours of seeing ever more birds and Hippos we turned around, watched fishermen sell their fish at Dunga beach and landed safe and sound back at the harbour. From there I rushed to work (three hours late) on the back of a motorbike.
What a beautiful morning.