I promised I would have some news about what the Serengeti team has been up to recently in the field. Our beloved camera-trap grid is still being cared for, cards downloaded, batteries replaced and cameras given the once over. So all is well on that front but what is the latest question being asked by the team.
Well thanks to the spatial occupancy modelling of the Snapshot Serengeti camera-trap grid we have learned a lot about how the animals share the environment. What we can’t derive from the camera trap images is the details of what the different species are doing when they are in those spaces and how so many large herbivores can exist together. It could be that they simply facilitate each others foraging or maybe they are using different resources. Scientists have identified what is known as niche partitioning, a mechanism that sees different species specialising in eating different proportions of grasses verses non-grasses; pure grazers and pure browsers and a sliding scale between the two. A second mechanism sees different species eating different parts of the same plant.
These two mechanisms seem to make perfect sense but it is not understood to what extent these two truly affect coexistence of large herbivores. This is where the Snapshot Serengeti team research comes in.
Under our own Dr Michael Anderson they have teamed up with Dr Rob Pringle and researchers at Princeton University in using a revolutionary new analysis method known as DNA metabarcoding to see what exactly each animal is eating.
Up until recently scientists studying herbivore diet had two choices, they could watch their subjects and try to identify what they were eating or they could use microhistology, whereby plant parts in faeces are visually identified. As you can imagine these methods are fine for differentiating between, say, grasses and trees but don’t allow scientists to classify down to individual plant species. With DNA metabarcoding they now have that ability and it should tell us a whole lot more about how the animals divide their resources in space and time.
So that’s the science but how does the team collect this data. Well as with microhistology it involves dung. Our intrepid scientists are roaming the Serengeti collecting poop from as many different herbivores as they can and then it all has to be shipped back to the labs for analysis.
If you are thinking that our team must be highly skilled detectives able to identify a wide variety of brown pellets in the savannah grasses then think again. That’s not to say they can’t but this work relies on 100% knowing which species produced said dung its sex and age as well as a sample that has not been contaminated in anyway. The method of collection relies then, on stealthy observation waiting for an individual to lift its tail and sprinkle the ground with brown pellets before running in with your sample jar at the ready to collect the freshly deposited “clean” offerings. I have some experience with this work and believe me it does feel slightly odd to be observing animals in this way, willing them on to have a bowel movement so you can move on to the next species. It is also a little risky as you can get so engrossed at watching your target animal that you forget there are predators there watching and waiting. At least in this project it is only herbivores the team are interested in, to do the same with predator’s faeces, that’s a whole lot more smelly.
The study is still in its early stages but the team reports they are already seeing some noteworthy things.
Spoiler alert, early results suggest that there are only two ‘pure’ grazers in Serengeti (zebra and warthog) and lots of variation between wet and dry season.
We will bring you further updates once the team has finished their analysis work and have the full results. It promises to be exciting stuff. In the meantime you can think on the glamorous job a field scientist has whilst you stay clean at home helping with the job of classification.
Those of you who have been with us for some time will probably have noticed that the image quality since we switched to the Snapshot Safari platform has reduced, sometimes dramatically. Before I go any further, we are trying hard to fix this but in the meantime I thought I would try and explain what the issues are in a hope that it may induce a little more patience from you. I am afraid that I really am technically challenged when it comes to computer stuff so I am going to be a little vague here but please, if there is anyone out there with more knowledge who can either help explain more appropriately or better still offer our team help don’t hesitate to get in touch.
So the trouble all started when Snapshot Serengeti joined the bigger Snapshot Safari platform at the start of this year. At this time Zooniverse was having a big overhaul with older projects operating on Ouroboros moving over to the Panoptes format. Essentially Ouroboros and Panoptes are both software packages which enable projects to build their pages and run them.
Of course Snapshot Serengeti being one of the oldest Zooniverse projects was designed using Ouroboros and has had some teething problems with the switch over. One thing to remember is that the teams involved with bringing all the camera trap images to the Snapshot Serengeti platform are for the most part unpaid graduate and undergraduate students studying ecology. They are not experts in computer programming yet have to keep the platforms running and fix all the problems.
In the old days the University of Minnesota based team would upload the batches of images from the camera traps and send them to Zooniverse who would process and upload them to the platforms. That was when there were a dozen or so projects. There are now over 50 active projects. Can you imagine how long it would take for Zooniverse to do all the uploading? To address this problem they have asked individual projects to manage the uploading themselves. To complicate this process a little more they have also placed a 600GB maximum file size on the images.
This all means that the team of ecologists at Minnesota have to engage computer code developers to write custom scripts enabling their super computers to interact with the Zooniverse web platform. The image quality issue then is not because we have started using different camera’s or taking images at a lower resolution it is due to the code that compresses the images from their full size to less than 600GB. Those images that were smaller in the first place have been less effected than the larger ones and hence the mixture of quality that we are seeing.
So as I said earlier we are trying hard to get this problem sorted and bring you back the kind of top rate images you are used to and hope to have things sorted with the next batch of images we upload. In the meantime please spare a thought for the team and remember that like you they are all volunteers, all be t with a slightly more vested interest in the research project. I hope that you will bear with us and keep up the much needed support you have always given us.
Symbiotic relationships are common in the Serengeti. They fall into two main types, mutualism, whereby both partners benefit from one another and commensalism, whereby one partner benefits from the actions of the other but the other partner is largely unaffected or unharmed. I wrote recently of oxpeckers and large herbivores, large herbivores provide food in the form of ticks for the oxpeckers and oxpeckers provide a cleaning service for the large herbivores, a good example of mutualism. Birds such as cattle egrets that follow buffalo around to catch the invertebrates the buffalo disturb as they graze is an example of commensalism. Of course it is not just animals that have symbiotic relationships; my blog last week on termites and mushrooms was another example of mutualism.
So what about zebras and wildebeests? We see them all the time on Snapshot Serengeti in mixed herds, grazing peaceably with one another. Is this just coincidence or is this a form of symbiosis?
It is actually hard to say and of course that is why labelling things, especially behaviour is often tricky.
Zebra and wildebeest are both grazers meaning they mostly eat grasses but that doesn’t mean they share the same diet. They preferentially eat different parts of the plants that they consume. Zebras are quite content chewing longer tougher grasses where as wildebeest prefer shorter, more tender shoots. This partition of resources means they can quite happily graze side by side with out exerting pressure on each other.
Another good reason to team up is the extra safety that numbers provide. Not only do more ears and eyes provide better early warning systems but the odds of the individual being targeted by a predator are reduced when there are greater numbers to choose from. Apparently zebra have better eyesight but wildebeest have better hearing so the two complement each other.
There could be another reason. Our very own Meredith Palmer just published a paper about interspecies reaction to each other’s alarm calls, you can read it here: https://www.sciencedirect.com/science/article/pii/S0003347217304207
She found that zebra, wildebeest and impala recognise each other’s alarm calls but that they did not always respond in the same manner. When zebra sounded the alarm all three herbivores reacted strongly but when impala gave the alarm zebra where likely to ignore it, or assess the relative danger themselves. It seems that this varied response is down to predator size. Impala are prey to a wide range of smaller predators that would not be able to handle a mammal the size of a zebra, so when impala give the call it doesn’t always signal danger for the zebra. However when a zebra, the largest of the three herbivores sounds the alarm, whatever it has seen will probably be able to take down the wildebeest or the impala too so it’s prudent that all three scarper.
It is an interesting reaction and maybe wildebeest hang out with zebra because they are more trustworthy alarmists. I am not sure that the companionship of zebra and wildebeest can be classed as symbiotic I think it is more of an interaction due to a shared habitat but it seems that on some level they can benefit each other.
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.
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:
Most people these days know what a hashtag is and it can be a powerful tool in terms of searching for like content on social media. Here at Snapshot Safari hashtags are useful to find unusual sightings and to search for images of specific animals. Having said that, used wrongly or overly zealously hashtags can become a nightmare. This guide is to help you know when to hashtag and when not to hashtag.
When not to hashtag
If you are not 100% sure of the identification of an animal then don’t hashtag. This is important as moderators spend a lot of time trying to get you to correct your wrong tags and it is counter-productive to the usefulness of hashtags for searching if the searches come back with wrong images. You can still flag the image for discussion where moderators will hashtag it if deemed necessary.
It is not necessary to hashtag every image you flag for discussion. Try and be selective and choose unusual images or those with some scientific relevance. Think what might be useful to the scientists or other citizen scientists.
Don’t give one image more than one hashtag. Labeling #wildebeast #wildebeastfrolicking #wildebeastresting all for one image is not helpful. Stick to using one basic description.
When to hashtag
Use a hashtag when you discover something rare or unusual; for instance a night image of giraffe with oxpeckers roosting on it, or a large pride of lions with young cubs.
Hashtag images you think are particularly impressive in terms of photographic quality. Hashtagging every image of wildebeest migrating is not necessary but if you find one image that has the wildebeest lit with a stunning backlight then go ahead and let us know.
The main message here is to think before you hashtag, why am I tagging this image?, does it really warrant it? Use them sparingly. If in doubt, leave it out.
The original Snapshot Serengeti platform will be deactivated on February 1st, 2018. There are still images left to classify, so please help us by finishing as many as you can before February 1.
With the launch of SnapshotSafari just eight days away, we would like to share a detailed explanation of the new interface and note a few significant changes. The participation of Snapshot Serengeti citizen scientists and moderators over the past seven years has provided researchers, conservationists, and computer scientists with invaluable information regarding wildlife populations, online classification systems, and citizen science platforms. We hope that you will continue to work with us on the new platform, so that we can continue to expand and improve our methodology.
Here is what you can expect to see on February 6, 2018:
Multiple sites: Moving Beyond the Serengeti
Figure 1. SnapshotSafari Parks & Reserves
As mentioned in a previous blog post introducing SnapshotSafari, Snapshot Serengeti will not be going away. Instead, it will become one of several camera trap sites that volunteers can select. The SnapshotSafari landing page will link to individual pages for each protected area and provide news and updates about the network overall and/or individual sites. The charming wood-panel background will be changed from time to time, showcasing interesting classified images or letting users know which sites need the most help.
When a user clicks on a site such as Snapshot Serengeti from the landing page, they will be taken to a page that resembles Figure 2.
Figure 2. SnapshotSafari interface.
For the initial launch, there will be six sites to choose from. These new camera trap grids are sending us images from Tanzania, Mozambique, and South Africa. For the first few months, we will release additional sites every three weeks, so make sure to check in often to see if a new location has been added. To navigate between the sites, simply log on to SnapshotSafari and select the reserve you’d like to visit. To return to the home page and go into a different site, click the SnapshotSafari tab at the top of the page.
Classification – What’s different?
Good news for those of you who have been with Snapshot Serengeti for years and are used to the classification system: as you can see in Figure 1, the interface will remain mostly the same.
Here’s how it works: A picture or series of up to three pictures will appear on the screen next to the species’ name list. When you click on a species name, a brief description and a few pictures will appear. If a volunteer isn’t sure of the name of the animal, there are a few tools they can use to help narrow down their choices. Citizen scientists can look at examples of tail shape, animal build, the color and pattern of skin/hide, and horn shape to identify the wildlife in each photograph. The “Looks-Like,” tab has changed slightly, providing silhouettes of animals (Figure 3) instead of descriptions.
Figure 3. “Looks-Like” Tab
Once a species is selected, users will still have the option to choose the number of individuals and record any behaviors. While the look has changed, the choices remain the same (Figure 4).
Figure 4. Number of Individuals and Behavioral Information
Have you ever wanted to zoom in on a picture to get a closer look at far away animals? Now you can! SnapshotSafari allows users to zoom in and out, click-and-drag the image, and rotate the image. Some of the new sites have new species, so you can expect to see a few new options on the list of potential species, such as nyala and klipspringer.
There will be several field guides available, providing users with clear images and detailed information about different groups of animals (e.g. deer, birds, predators, etc.). These are always available for reference to help volunteers hone their classification skills and provide information on the most challenging species to identify or distinguish between. Some of these field guides utilized information and images collected on the Snapshot Serengeti discussion pages. A special thanks to those of you who helped collect related images and develop tutorials; know that your efforts have been recognized and contributed to the development of these field guides.
Volunteers still have the options to, “Collect,” and “Favorite” images. After identifying the wildlife in the photograph, one can choose between, “Done,” or “Done and Discuss.” Clicking on, “Done and Discuss,” will take them to the, “Talk” section of each site. More details on the discussion section is provided below.
There are still pictures that need to be classified at www.snapshotserengeti.org. We are hoping to finish these classifications before the launch of SnapshotSafari. If we don’t finish with the remaining images, they will be uploaded in batches to the new SnapshotSafari website in Snapshot Serengeti’s unique page.
Collections & Discussions
UPDATE: The Snapshot Serengeti website will no longer function after February 1st. When SnapshotSafari launches, the main www.snapshotserengeti.org site will be redirected to SnapshotSafari. The talk.snapshotserengeti.org site won’t be changing at all in the short term. In the long term its contents will be archived permanently, including your collections and favorites.
Each site will have their own discussion forums under the associated Talk section. We are happy to announce that users will no longer be taken to a separate site or tab to participate in or read through the discussions; it is all available on the Zooniverse site! If you want to ask a question, start a discussion, or share a cool picture, you can do that by clicking the Talk tab. When you are ready to resume classifying, you just click on the Classify heading to return to the site’s photos.
Our moderators and a group of volunteers have gone through the discussion forums of Snapshot Serengeti, and they selected several discussion topics to transfer to SnapshotSafari. The majority of the Serengeti forums will not be transferred, but will remain on the old Serengeti site.
Where/When can I find out more?
This Wednesday we will start a countdown for the official launch of SnapshotSafari, featuring detailed descriptions of the six new sites being featured in the initial launch. You can also post your questions in the Serengeti discussion forums until February 1st and follow us on social media for updates.
Twitter: @UMNLionCenter, @SnapshotSafari, & @snapSerengeti
Facebook: Snapshot Serengeti, UMN Lion Center, SnapshotSafari
Instagram: umnlioncenter, snapshot_safari
*This weeks blog was written by Jamee Snyder, project coordinator and administrative assistant with the Lion Lab, University of Minnesota. She tells us all about a wider a project that Snapshot Serengeti has evolved into and what we can look forward to in the near future.*
Seven years ago, the University of Minnesota Lion Center set out 225 cameras in Tanzania’s Serengeti National Park. These cameras have recorded over 50 species including some of the most threatened species on Earth. With help from over 140,000 citizen scientists from around the world, millions of photographs were reviewed and classified over the past seven years, which provided park managers, conservationists, and researchers with the necessary information to analyze African wildlife population dynamics. This collective effort is a major contribution to ecological research, allowing for the evaluation of long term trends in wildlife populations as well as best practices in conservation management of charismatic african mammals.
Snapshot Serengeti was one of the first camera trap surveys to document wildlife populations in a national park and is now one of the longest running camera trap surveys in the world. We have learned a lot over the years, from how to keep our cameras safe from hyena jowls to retrieving data from memory cards that have gone through a wildfire. We are continuously looking for ways to improve this project.
Thanks to years of experience, your participation, and help from several organizations in the U.S. and Africa, we are excited to announce that Snapshot Serengeti is expanding into an international conservation initiative called, “SnapshotSafari.”
Don’t worry! Snapshot Serengeti isn’t going anywhere. In fact, it will remain essentially the same as we transition into our new platform. The discussion forums and personal image collections will still be available to current and future users. Now, participants will be able to see numerous other parks in addition to the Serengeti. SnapshotSafari will showcase camera trap images from multiple camera trap grids inside dozens of parks and reserves located in six African countries. Intrepid citizen scientists will be able to choose from various exotic habitats, including but not limited to: the Sand Forests of KwaZulu-Natal, the Lowveld of Limpopo, the Fynbos of South Africa’s Cape, and the Karoo desert, in addition to such remarkable ecosystems as Mozambique’s Niassa Reserve, Tanzania’s Ruaha National Park, Swaziland’s Mbuluzi Game Reserve, and Botswana’s Makgadikgadi Pans National Park.
By incorporating multiple sites, we can ask more complex questions regarding African wildlife populations and the factors that contribute to ecosystem stability. For example, researchers can compare population dynamics of reserves that are fenced versus those that are unfenced, or theycan evaluate the environments that successfully host multiple predator species without depleting prey populations. Researchers at the Lion Center will use this dynamic platform to investigate the cascading effects of large mammal reintroductions and ways to limit direct human interventions while still maintaining stable ecosystems within fenced reserves. SnapshotSafari provides an opportunity for participating reserves to collaborate and subsequently develop the most effective conservation strategies for protecting biodiversity.
We are working hard to get SnapshotSafari ready to launch in January. We just completed beta-testing, and the feedback has been very positive. To all of the citizen scientists who participated and to those who continue to be involved with Snapshot Serengeti, we are extremely grateful!
Now, we need your help to finish classifying the final series of images on our original platform, Season 10, at http://www.snapshotserengeti.org before we initiate SnapshotSafari, which will host Season 11. We are very close to finishing classification of these images, so don’t hesitate to invite your friends and family to take a trip to the Serengeti through the lens of one of our camera traps and classify wildlife. Let’s push this meter to the end!
Stay tuned for an official count down, so you can be one of the first to participate in SnapshotSafari and contribute to our collective knowledge and ability to successfully conserve African wildlife.
Well it is that time of year again when the winners of the prestigious wildlife photographer of the year awards are announced.
Having a browse through this year’s winners I notice with a touch of sadness but a good dose of hope just how many of the photos touch on the demise of wildlife and have a conservation message. Brent Stirton’s moving image of a poached black rhino although tragic is a strong weapon in itself in the fight to change the hearts and minds of those people that covet rhino horn.
One of my favourite images is in the bird behaviour category. The much maligned marabou stork is the subject and the shot was taken in the one spot on this planet that Snapshot Serengeti fans know so well, yes the Serengeti.
But the story doesn’t end there. The photographer who was awarded finalist in the bird behaviour category is well known to us. Daniel Rosengren worked for the Serengeti Lion project for 5 years in the field with the most enviable job going. He spent every day following the study lions getting to know them intimately and generally building up the rich source of study data that this 30 year+ project has gained.
Of course when Dr Ali Swanson came up with her wonderful idea of seeding the area with 200 odd camera traps and the Snapshot Serengeti project was born it was Daniel who looked after our precious cameras for several years. So we have a lot to thank him for.
Daniel moved on from the project in 2015 to pursue a career as a professional wildlife photographer and we congratulate him on his achievement this year in the wildlife photographer of the year award. Well done!
If you want to learn more about the story behind his image or just want to see some stunning wildlife images visit his website here http://danielrosengren.se/wpy-awardee/
And to see all the other winners from this year’s wpy 2017 visit
Some of you will have noticed that our progress bar on season 10 has not been showing any progress. Well it turns out that we have made loads of progress, it’s just the bar that was not getting anywhere.
The good folks at Zooniverse have fixed it for us and you will now see we are about half way through season 10 which is fantastic. There are just under 700 000 images to classify this season so thanks to you, are dedicated team of citizen scientists we have around 350 000 left to go. That’s 350 000 chances of finding that one image you have been waiting for. I have noticed recently lots of you posting on talk that you have classified your first ‘waterbuck’ or ‘serval’. If you haven’t discovered your dream find yet there is still time and yes there is a season 11 in the wings.
Whilst on the subject of talk I wanted to gently remind everyone of a few etiquette points.
#Hashtags, love ‘em or hate ‘em they are part of social media and they are not going away. On Snapshot Serengeti we use them for a specific reason and that is to help others to search for and find certain images.
If you have found a great image that you think others will want to see and you are certain of the species then go ahead and hashtag it, but, if you find an image that you are not sure of then please don’t hashtag it with your guess. You can still put the pictures up in talk for discussion and perhaps someone else will be along who is positive about the id and can then hashtag it. Basically, please use hashtags thoughtfully.
Which brings me to another point; if you can’t identify an image and you post it up for discussion always give us your best guess. No one will laugh; it’s what makes it fun seeing what other people make of the images when you are really stumped. Many a time I have confidently shared a tricky image almost certain for instance it’s a long sort after rhino only to have someone else’s eyes point out that if I look a bit closer that actually it is a rock! Even our expert modifiers get things wrong occasionally and are reluctant to confidently make a call on certain images. Some of them are just so darn impossible to id. So just give it your best shot, it’s what everyone else does.
The main aim is to enjoy yourself, challenge yourself and use other peoples experience when yours fails you. The Snapshot family of classifiers and moderators is a dedicated and knowledgeable bunch and as I have said before, this project would not exist without you all. Keep up the great work one and all.
This summer in South West France has not been its usual hot balmy self. In fact as I look out the window now the overriding colour is a deep lush green. Normally by July it is turning a straw yellow colour but this year we have had plenty of rain. In contrast, to the south of us, fires have been raging through Portugal, Spain and South Eastern France. Who knows if this is a taste of what’s to come or a one year glitch in the system but one thing is for sure climate change is going to affect life on this planet in both subtle and not so subtle ways.
I wrote about termites last week and their importance in the ecosystem. This week I read a disturbing news article about aardvark, who of course survives on eating termites and ants.
A group of scientists in South Africa were studying aardvarks in the Kalahari. They had inserted biologgers into several aardvarks in order to follow their activity and body temperature. It turned out that the year of their study was an exceptional year of draught and all but one of the study animals along with others in the area died. They unexpectedly recorded a phenomenon not seen before that should be an eye opener to the ways in which future climate could affect not only individual species but whole ecosystems.
The aardvark themselves can withstand high temperatures but the termites on which they rely for food and water cannot. With the information provided by the biologgers the scientific team where able to see that the aardvark were not finding enough termites or ants to keep their energy levels up. Night times can be pretty cold in the Kalahari and the team found that the starving aardvark even swapped their usual night time foraging behaviour to day time in order to conserve body energy. They were even seen sunbathing in a bid to save energy. It seems that none of this adaptive behaviour was enough. There simply was not enough food for their needs and they slowly starved to death. At an average weight of 60 to 80 kg an aardvark is a large animal and needs to eat around 50 000 termites or ants a night.
One or two bad years will always happen but if climate change shifts as it is predicted many areas of Africa will become drier and hotter creating an aridity that most of the native termites and ants cannot tolerate. True, given time, more tolerant species may take over but in the meantime the much loved aardvark may become a creature of the past. But that is not the end of the story. The aardvark is more than just a curiously put together animal, it is the architect of large burrow systems that many other mammals, birds and reptiles are reliant on to escape extremes of hot and cold weather, to bring up their young and escape from predators. Most cannot excavate the hard earth themselves so with the possible demise of aardvark life would get a whole lot tougher for many many more animals.
If you want to read more about the study have a look at this link https://africageographic.com/blog/aardvarks-beating-climate-change/