Archive | March 2018

Mythical Mushrooms

Termitomyces schimperi

 

 

Whilst we wait for the next batch of Snapshot Serengeti images to be processed and posted up for us to classify I thought I would regale you with a short tail from my recent field work in Namibia. I was based on a cattle farm near to the small town of Otjiwarongo. One of the highlights, apart from the wealth of wildlife living alongside the cattle came as a total surprise. Mushrooms, giant, dinner plate sized tasty mushrooms.

Who would have thought to discover such a delicacy in the thorny scrubby bush of north eastern Namibia, a place normally thought of as desert.

I was out driving the boundaries of the farm with the owners one Saturday morning when they came to an abrupt stop and started reversing backwards. When we stopped they jumped out as if for action crying Omajowa! Thinking this was some Herero word for poacher or something similar I prepared myself for action too following them towards a very tall termite mound.

Omajowa were no poachers, they were giant mushrooms growing all around the base of the termite mound and according to my hosts, delicious. They expertly plucked a few out to take home for dinner and to share amongst the staff. We ate them cut into large chunks, breaded then fried like a schnitzel. Yes they were a taste to behold I can tell you.

The Ejova (singular, Herero name) or termitenpilz (German Namibian name) is the mushroom species Termitomyces schimperi. Termitomyces species are found over much of West, East and Southern Africa and live in association with various termite species.

In Namibia omajowa are found on the mounds of the termite Macrotermes michaelseni that build very tall mounds reaching heights of 5 meters tall. It has been noted that these often incline to the north.

The termites cultivate the fungus by providing a perfect substrate and perfect microclimate for the fungus to grow whist eliminating any competitors to the fungus. In return the fungus helps break down plant material aiding the efficient uptake of nutrients for the termites as well as providing additional food sources from its own body that are rich in nitrogen.

The omajowa, like most fungus is for the most part concealed away below ground but when conditions are right, in this case after a good rainfall between December and March the more familiar fruiting body emerges from the base of the termite mound growing on a stalk up to 50cm high with a cap that can reach 40cm diameter. Usually in groups of 5 to 10 up to 50 on one termite mound have been recorded in Namibia. They are really quite a sight.

From a cultural perspective they are seen by Namibians as a symbol of growth and prosperity and they are eagerly sought out. It is not unusual to see someone standing on the road side hefting one of these giants up in the air in an invitation to stop and buy from him.

Once pulled from the ground they have a strangely alien appearance with the dangling pseudorhiza (root like structure) still attached, though it is probably more ecologically sound to leave most of the pseudorhiza behind. The termites will feed on this and the remaining fungus will carry on growing to pop up another year. Like everything in nature, sustainable thoughtful use should be practiced in order preserve the delicate balance of life.

 

Termite mound in Namibia

 

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The Giraffe and the Oxpecker

IMAG0415

 

Those of you who follow our Facebook page will have seen recently that Meredith Palmer, one of Snapshot Serengeti’s scientists and PhD candidate with Minnesota University just published a paper in African Journal of Ecology with the catchy title;

Giraffe Bed and Breakfast: Camera traps reveal Tanzanian yellow-billed oxpeckers roosting on their large mammalian hosts.

The paper highlights one of the more unusual behaviour traits documented by our cameras and discovered by our classifiers of yellow-billed oxpeckers (Buphagus africanus) roosting on giraffe at night time.

Those of you that have been with us a while may have had the pleasure of finding one of these night time images of giraffe with oxpeckers tucked up safe and snug between their back legs. In fact I wrote a blog about this back in 2014.

https://blog.snapshotserengeti.org/2014/01/17/the-curious-case-of-the-giraffe-and-the-oxpecker/

Two species of oxpecker are found in the Serengeti, the red-billed and the yellow-billed oxpeckers. Whilst the red-billed will feed from a wide range of hosts from impala and wart hog to hippos the yellow-billed oxpecker is more discerning and prefers large hosts such as buffalo, eland and giraffe. The problem with this choice is that these animals are far roaming and if the birds were to find trees to roost in at night, and these can be sparse in the Serengeti, the yellow-billed oxpecker could struggle to locate its host the following morning. It seems they have overcome the problem by staying over on the hosts. What’s more is these clever birds have opted for the premium rate rooms where they are not disturbed during the night for, as is well documented, giraffe almost never lay or sit down at night time preferring to stay upright.

So although during the day yellow-billed oxpeckers are found on several large mammal hosts most of the night time images are of giraffe roosts. It seems they also have a preference for the groin area of the giraffe. It is not hard to imagine that this would be the warmest safest spot on the giraffe, the cavity created where the two hind legs meet is spacious enough to accommodate a small flock of birds and of course is also very attractive to ticks so if they fancied a mid-night snack…..

It is these unexpected discoveries that make the project so exciting and worth all our effort in taking part so next time you are racing through the classifications take a little time to have a closer look at the images, you never know what is waiting to be discovered.

 

If you want to read more about Meredith’s paper you can read the following:

https://news.nationalgeographic.com/2018/02/animals-serengeti-tanzania-birds/

 

 

 

 

Welcome New And Old

Lion pride

So the new Snapshot Safari base camp for Snapshot Serengeti is a month old and teething problems aside all seems to be going well. I just wanted to take this opportunity to welcome all our new classifiers and to say a big thanks to all our old classifiers who have stuck with us. But most of all a massive thank you to our moderators who have worked so hard to make the transition run so smoothly. They have answered all your questions and queries without my back up due to the unfortunate timing of my own African field trip falling during the launch of Snapshot Safari.
It is not the first time Snapshot Serengeti has seen a big change. Some of you may remember its first outing as Serengetilive back in 2011. In those days things where a lot slower, you started classifying by first choosing an individual camera and working through it. There was an option to skip images, leaving them for someone else. Of course what ended up happening was all the hard to identify images and all the no animal grassy images were left to the end so that some people never got the chance to classify any animals.
We then progressed, in 2012, onto the Zooniverse platform and saw a huge change to the way things worked. Suddenly there was a lot more interaction between the scientists and the community. This was when the famous algorithms where developed by Margaret Kosmala and Ali Swanson and their team to act as a fail proof to anyone incorrectly identifying images.
We are all very grateful for their hard work and dedication that results in us classifiers being confident that our guesses won’t mess everything up.
So I hope that you are enjoying this third incarnation of Snapshot Serengeti and can be proud that it has worked so well over the years that it has spawned so many new projects.
My own field trip to Africa is coming to an end this week and I will be back in the land of internet connection. I will then hopefully be bringing you more regular posts and more updates on the project itself and how it is progressing. In the meantime don’t forget to check out our facebook and twitter pages.