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The Square

So you probably know by now that season 10 is up and running and there have been some amazing camera-trap images uncovered already. As well as a few lounging lions and wandering wildebeest there have been some stunning aardvark and wildcat images.

This season has turned up quite a few images with a central square that is brighter than the rest of the frame with a luminous look. These somewhat Warholesque images look as though they have been photo-shopped and I love them. Here are just a few. My favourite is the zebra, its perfect.

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Warthog backside

 

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Tree with Landrover

 

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Zebra

 

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cheetah

 

Obviously these are not some new form of art but have a more down to earth source; a malfunction with one of the camera trap types. A patch provided by the manufacturer restores the image to normal which for scientific purposes is very good but from the purely aesthetic side its kind of sad, I like “The Square”

 

 

Topi versus Hartebeest

Here is another pair of antelope that are often muddled up on Snapshot Serengeti; topi and hartebeest. These two share a similar size and body shape and for those of you not familiar with them they can prove a bit tricky.

Topi and hartebeest belong to the same tribe, Alcelaphini, which also includes wildebeest. These antelope typically have an elongated face, long legs, short necks and stocky bodies. Although these antelope have reasonably large bodies their long legs mean they have retained the ability to run fast, a good adaptation for life on the open plains. It is believed that the long face developed in place of a long neck in order to reach the grasses they consume.

There are several species of both topi and hartebeest in Africa, two are found in the Serengeti. Coke’s hartebeest or kongoni (Alcelaphus cokii) are selective grazers with browse making up less than 4% of their diet. Serengeti topi (Damaliscus jimela) are 100% grazers

In both species males are territorial but topi also form leks from which to display to passing females. Males holding territory close to the lek are more desirable to females. Dominant females will actively prevent subordinate females from mating with these males.

 

Topi                                                         Hartebeest

So side by side we can see that the topi is much darker coloured than the hartebeest with distinct sandy socks up to its knees and conspicuous black patches on the thighs and shoulders. In contrast the hartebeest has pale legs and underbelly with a darker upper body. The paleness forms a patch on the top of the thigh.

 

Topi                                                                        Hartebeest

From behind the contrast between leg colour and backside is very obvious with topi sporting dark legs with pale rump and back and hartebeest pale legs and rump with dark back.

Horn shape is also different. A topi’s horns sweep up and back whereas a heartebeest’s sweep out to the side before kinking back. They also sit on a prominent bony ridge on the top of the head.

Hopefully this will help you tackle all the images waiting on season 10.

Grant’s Verses Thompson’s Gazelle

 

The Zooniverse team are super busy at the moment but hopefully very soon season 10 will be loaded and we can all get cracking with what promises to be a fantastic season full of amazing images.

In the meantime I thought I would post a few notes on those tricky animal pairings that seem to have more than a few people stumped when trying to id them.

To kick it off we will look at Grant’s gazelle and Thompson’s gazelle. If you were treated to perfect photos every time I think you would get the hang of these two pretty quick but with the often blurry or distant images we get on snapshot they can be tricky.

 

Grant’s gazelle A                        Thompson’s gazelle A

 

A; First off there is the overall colouration. Thompson’s has a thick dark stripe across its side, Grant’s usually lacks this but be aware as some Grant’s have a dark stripe too. Not the best distinguishing feature as there can be quite a bit of colour variation.

 

Grant’s gazelle B                          Thompson’s gazelle B

 

B; A better distinction is the facial markings. Grant’s gazelle has a thick black stripe running along the side of the face from the nose passing through the eye to the base of the horns giving a masked look. Thompson’s has the same stripe but it ends at the eye, not passing through. The white band on top of the black stripe is more distinct on Grant’s.

 

Grant’s gazelle C                                  Thompson’s gazelle C

 

C; If you get a back-side shot then Grant’s displays a much whiter overall appearance with the white area extending past the root of the tail up onto the back. In Thompson’s the white area stops at the root of the tail. Grant’s tail is white at the root and thin with whispy black end, Thompson’s is dark and fluffy looking. The black vertical bands in Grant’s are also more prominent.

 

Grant’s and Thompson’s Gazelle

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Photo NH53, Flickr (https://creativecommons.org/licenses/by/2.0/)              

In a mixed group the smaller size of Thompson’s is evident, although with young animals it is not so obvious.  Here you can easily see most of the features discussed above with the Grant’s gazelle comprising the 7 animals to the right back and the Thompson’s gazelle to the left forward. Note the Grant’s gazelle side on at the back, it shows a much darker side stripe than the others more a kin to Thompson’s. Males and females of both antelope have horns with the females usually shorter and thinner. In some females horns are absent. In general Grant’s are more graceful looking than the stocky Thompson’s.

 

 

The River

The Oliphants River

 

Now that we have finished classifying season 9.5 and we have a short break before season 10 is launched I thought I would muse a little on my favourite wildlife setting; Rivers.

I live in South West France next to a river. Its gentle passage demands my attention constantly. That’s because rivers are magnets to wildlife. Everything needs water to drink and in a dry area it means your best chance at seeing wildlife as they come to drink.

In Africa too, I lived by a river and what a special place that was. The Oliphants, sometimes a trickle sometimes a violent torrent, flows into Kruger National Park and I was lucky enough to live on its banks for 4 years. I could watch the daily spectacle of life unfold from my stoop. I watched baboon troops clash viciously, hippo’s endlessly dose, leopards stroll the beaches, fish eagles catching supper. I once watched a four meter long rock python ascend the cliffs opposite effortlessly and I followed the progress of a family of spotted eagle owls on a nest in a crevice, worrying absurdly when the river began to turn chocolaty and rise. They survived but I was ready to brave crocs and hippos and swim over to rescue them.

You can watch for hours and see nothing then turn your back for a second and suddenly 5 kudu have appeared out of nowhere. One early evening I sat watching, all was quiet except the birds calling in the bushes. It was approaching the hour that nightjars start to sing. All of a sudden the shrill nasal alarm snort of a Klipspringer rang out quickly followed by the outraged screaming of vervet monkeys. Grabbing binoculars I focused on a blur on the rocks opposite in time to see a klipspringer launch itself off landing with an almighty splash in the river. A leopard came to a screeching halt on the rocks not wishing for a swim. The river meanwhile was flowing pretty fast and I thought the klipspringer, more suited to rocky precipices than water, would drown.  Amazingly the stout little antelope managed to swim to the shore and clamber out, shaken no doubt but alive. I often wondered if he ever made it back to his side of the river.

A stroll down the beach was always an education. The damp morning sand would show who had passed previously and was great for practicing tracking skills. On one such stroll I noted an absence of leopard tracks on my outward walk only to discover on my return journey that a leopard had left its mark on top of my foot prints; a little disconcerting.

The river, for most of the year, retreated to the deeper channels leaving a boulder strewn sandy beach lined with large trees such as sycamore figs and marulas. During the driest part of the year we really felt our connection to the great Kruger Park. Our reserve was quite small by African standards and did not have elephant or lion resident but during the dry period elephant would take to wandering the river course right out of the park and would spend a few weeks looking for food on our reserve before wandering back to the park. Lion too followed this same route and it was always a thrill to double take on a seemingly large leopard print only to realise it was in fact a lion.

The other end of the scale came with the rains. The river could rise meters in minutes turning a deep chocolate brown. The force of its passage was astonishing, great trees would be swept down, I have seen cars and sofas swirl by. Most of the animals that live in the water seem to get out whist the storm passes but I watched a hippo once in the full force of the raging river and I suspect that it wasn’t by choice that he was in there that somehow he couldn’t get out.

So benign or raging, highway or refuge the river is like an anchor to wildlife. The chance of seeing wildlife there is strong but even if you don’t they are intrinsically beautiful places.

Meet the People

 

Over the next few months I would like to bring you a few blogs about the many people that work to make Snapshot Serengeti possible. Without them there would be no data for us to pour over but what exactly do they do and who are they?

Dr Michael Anderson is currently in the Serengeti collecting data and checking up on how the various projects that make up Snapshot Serengeti are getting along. As part of the projects commitment to engaging with the local community Michael has begun a National Geographic funded intern program. Its aim is to give young locals valuable training and research experience in the fields of ecology and conservation.

The first student to be taken up on the program is Roimen Lelya Olekisay. He is a Maasai from the Ngorongoro Conservation Area. His story highlights why the intern program is a vital part of both the scientific and conservation work we do. Many local people see wild animals as a threat to their own domestic stock as well as themselves and retaliatory killings are common. Living alongside wildlife is not easy. Without the good will of the local people it is very hard to change their attitudes to the work we do and the animals themselves.

Roimen grew up on the Western slope of the Ngorongoro crater, his family, like many Maasai are herders. As a young boy he roamed all over the Ngorongoro protected area (NPA) with the family livestock. The Maasai are permitted to live in the NPA where they can graze livestock but are not allowed to cultivate the land. Roimen spent two years away at secondary school before returning to the family to continue herding. This is a familiar story for many Maasai. The importance of livestock is paramount and many boys do not complete schooling.

As a young warrior, like many his age, Roimen speared and killed at least three lion. Tradition dictates that young Maasai warriors must kill a lion to become a man. He would have maybe carried on killing lions whenever he perceived a threat to his family’s livestock but he met up with Ingela Jannsen’s group Kope Lion Project in 2013 who work in the area trying to mitigate lion/human conflict. He helped fit a radio collar to a lion and this interaction with the king of beasts up close transformed him from a lion hunter to a lion protector. He became one of Ingela’s lion scouts (more about Ingela and the Kope Lion Project in next week’s blog) recording predator-livestock attacks in the conservation area and working to prevent lion conflicts and hunts. His enormous enthusiasm for lions and their research makes him a perfect candidate to further his scientific skills. This is someone with a natural ease and interest in the wildlife around him and its preservation.

In his new role as the first intern for the National Geographic-Serengeti National park program Roimen will be tracking lions and setting up a camera-trap network that hopes to dissuade human-lion conflicts and generally learning all the scientific skills associated with this work. He has just started and will be with us for six months, hopefully we can catch up with his progress in a few months.

 

Photo’s curtsey of Ingela Jannsen and KopeLion project

 

 

Black and White

 

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Grants Gazell

This past week I have been trudging up and down boggy slopes with armfuls of tree protection tubes, posts, tools and finally trees as part of a reforestation project in the Lake District National park, UK. With storm Doris fast approaching it has been a miserable week and my mind has often wandered over to snapshot Serengeti for some light relief.

 

The job I am doing, trying to help mitigate the over grazing of sheep and deer made me think of Michael Andersons work that has provided us with the images for season 9.5. He has written here about the project to study how herbivores affect vegetation patterns and you will have seen the enclosures around his experimental plots.

 

Some people have found that the images from this season are not quite as good as in previous seasons, they seem to be a bit fuzzy in places and there are a few less lions. On reflection though it does seem to be producing a lot of my favourite images, those taken during dusk and dawn when the camera is not quite sure if it is day or night and ends up taking a black and white daytime shot. These pictures can be quite exquisite and have the feel of being completely composed by a top photographer rather than just a random event.

 

Here are some of my favourites.

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Zebra/Wildebeest

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Impala

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Wildebeest

 

 

It is a good reminder to us all that although we are all waiting to discover that one truly great animal capture and it is gratifying to classify the more unusual beasts the aim of the whole project is science. Back in the old days of Serengetilive the classifying was done one camera roll at a time. Sometimes I would sit and classify 2000 capture events of….. grass. Seriously, you would be luck to maybe get a passing bird but it had to be gone through just in case the last couple of shots were of lion. At least with Snapshot Serengeti the pictures are randomised so you get shots from a mixture of cameras rather than being stuck on a tedious one.

 

Snapshot Rhinos

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One of the animals that continue to be a rarity on snapshot Serengeti is the rhino. We have had a handful of capture events over the years.

There are two species of rhino found in Africa; the white or square lipped and the black or hook lipped. The Serengeti is home to the latter. It is a large bulky mammal and as such many a hopeful #Rhino has turned out to be a blurry image of an elephant or buffalo.  Things can get confusing with some of the images but isn’t that half the challenge trying to guess those indescribable blobs? Surely it wouldn’t be the same if everything was easy to id?

Anyway back to Serengeti rhinos.

Just 50 years ago between 500 and 700 Eastern Black Rhino (Diceros bicornis michaeli) roamed the Serengeti-Mara ecosystem but during the seventies the population was decimated by poaching to around 10 or so individuals.

A huge effort is being made by various conservation and government bodies with enormous donations by private individuals to save the population from total extinction. Notably a remnant population in the park was highly protected and slowly, over the next few decades the population made some recovery. In 2010 it was decided that the Serengeti area was being protected well enough to try and bolster the resident rhinos with new genetic stock. It just so happened that a private owner in South Africa had a breeding herd of Eastern black rhino that had been part of the attempt to safe guard the subspecies back in the 60’s, these animals had originated from Kenya. With strict controls by IUCN officials it was deemed these animals were of the right genetic stock to be reintroduced to the Serengeti.

The plan was to translocate 32 rhinos over the next few years and release them in a new site close enough to allow some overlap with the resident 30 or so rhino. Unfortunately the project has been affected by the recent escalation in rhino poaching and it is difficult to find how many rhino have been successfully translocated to date let alone the current Serengeti total population but you can bet it is still small. The IUCN red data list states Tanzania as having 88 Eastern Black Rhino in 2011.

If you are lucky enough to stumble across a rhino capture on Snapshot Serengeti you should definitely celebrate … and don’t forget to # it.

Reintroducing the Wild Dog

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Snack Time

One of the neat carnivores I got to work with in South Africa that we don’t experience much in Tanzania is the African wild (or “painted”) dog. These endangered carnivores live and hunt in highly social packs which, like wolves, are dominated by an alpha male and female. African wild dogs used to roam the Serengeti, but vanished in the park in the early 1990s due in part to diseases such as rabies and canine distemper contracted from domestic dogs.

During my first field season, I was fortunate enough to watch a pack of these animals being re-introduced into the park, and several more releases have taken place since. In total, over 60 wild dogs are now recolonizing Serengeti — we haven’t seen any in our camera trap areas yet, but there are rumors that they might be wandering through soon!

 

Wander over to Wildebeest Watch!

Wildebeest Watch Home

Can’t get enough of these gnarly gnus? Head on over to our new spinoff project, Wildebeest Watch!

In collaboration with Dr Andrew Berdhal from the Santa Fe Institute, and Dr Allison Shaw at the University of Minnesota, we are taking a closer look at what the wildebeest are doing in the Snapshot Serengeti images to try and better understand the details of the world’s largest mammal migration.

Every year, 1.3 million wildebeest chase the rain and fresh grass growth down from the northern edge of the ecosystem down to the short grass plains in the southeast. We have a broad-scale understanding of where they are moving across the landscape, but don’t understand how they make these detailed decisions of where and when to move on a moment-to-moment basis. Wildebeest as individuals aren’t known for being particularly smart — so we want to know how they use the “wisdom of the crowd” to make herd-level decisions that get them where they need to go.

So while you’re waiting for more photos of lions, hyenas, and other sharp-toothed beasts, why not wander over to Wildebeest Watch to help us understand the collective social behavior of these countless critters?

Curbing Idealistic Images and CDV for the Sake of Lion Conservancy

Meredith: Our brilliant team of Snapshot Serengeti undergraduate volunteers at the University of Minnesota are perhaps even more on top of the lion literature than I am! This week, we have a guest post from one such student, Clayton Mazur, describing some recent work of Dr. Packer’s on lion disease spread in Serengeti Park. This post is a synopsis of a scientific paper that can be accessed in full here

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I propose we play a word-association game. I will offer a word and you think of what comes to mind. “Africa.” Did you imagine Mt. Kilimanjaro, or the towering, lush rain-forests of the Congo? “Wildlife.” Did you envision the sprawling savannas of Tanzania, home to hundreds of thousands of migrating wildebeest? If so, I would bet that your savanna also included the enigma of Africa: the African lion. Was he a graceful figure standing upon Pride Rock looking out over his kingdom? Perhaps he was laying in the shade, his dark mane flowing in the breeze as he waits for the females to return with a kill. I would argue that elegant images such as these are what come to mind for the majority the public. The portrayals of lions in the media- from Lion King to the MGM Lion- support this notion.  As elegant as these images are, reality is less than elegant for the lions living in Serengeti National Park in Tanzania, Africa.

African lions have unique social structures that help them brave the tough conditions of the savanna. Lions live in families called prides; one to two male lions rule a pride. The roles of female and male lions within a single pride are vastly different.  While females hunt, raise the cubs, and reproduce, male lions defend the pride from attack by other predators such as hyenas. Living in a large family group offers lions protection, but it also comes with costs. One cost is that females need to supply a large number of individuals with enough food for survival. Female lions coordinate hunts whereby they stalk prey and then give chase, but this technique only yields about 26% success. The low success rate forces large prides to split or starve.  Perhaps a more interesting difficulty of living in a large pride is the spread of disease within lion populations. As Dr. Craig Packer has found, disease prevalence is a threat to the current lion population.

A fatal disease that persists in the carnivores of Serengeti National Park is Canine Distemper Virus (CDV). CDV infects a range of carnivores, from dolphins to rodents and even some primates. The viral infection causes encephalitis, pneumonia, anorexia and eventually, death. You may be familiar with CDV if you own a dog, for many owners in the US vaccinate their dogs for CDV. In Serengeti National Park, where local villages cannot afford to vaccinate their dogs, CDV is a conservation concern for African Lions who contract CDV from domestic dogs. To try to remedy the concern, an intense vaccination regime started in 2003. Packer and colleagues attempted to characterize the progression of CDV in both domestic dogs and African Lions. Their goal was to determine if domestic dogs were responsible for the infections observed in African Lions. The team also wanted to determine if the 2003 vaccination program had any effect at reducing CDV in the domestic dogs and/or African Lions.

The scientists worked with blood plasma collected from both domestic dogs (obtained from 1992-2012) and from African lions (obtained from 1984-2012).  After collecting the blood samples, the team ran serological tests to detect for the presence of the CDV virus in individual dogs or lions. Using a Bayesian model, the scientists then calculated the probability that an individual lion or dog would contract CDV in one year. The scientists also used sensitivity models to determine the extent at which domestic dogs transmit CDV to lions. From the results of these models, the scientists were able to comment on the fate of the lions with regard to CDV.

The research team drew results by interpretation of the two models. They found that CDV had persisted in the populations of both dogs and lions for more than 25 years. Outbreaks of CDV occurred in 1981, possibly in 1976, and in 1993. Not only do these results suggest a historic presence of the fatal disease in the national park, the dynamics of each outbreak of the disease was unique. The scientists found that the year in which CDV infected the most dogs differed from the year in which CDV infected the most lions. The researchers proposed that this pattern identified domestic dogs as initial vectors for CDV in the park. After a 1994 outbreak in the lion population, the dynamics of the outbreaks become more disjoint. The disjointed dynamics between the domestic dog and lion populations suggest that after 1994, infections cycled through the dog population and the lion population separately. However, the spread of CDV between dogs and lions was not eliminated after 1994.

With domestic dogs established as an initial vector of CDV, the scientists wanted to know transmission rates between domestic dogs and lions. Again, they used a sensitivity model to predict this factor. The scientists found that domestic dogs were ten times more likely to spread CDV to lions than lions were to spread CDV to domestic dogs. With such a high prevalence of CDV in the domestic dog population and the tendency for CDV to spread from dog to lion, the effects of the 2003 vaccination effort were an important factor to analyze for the conservation of the Serengeti National Park lions. The scientists first analyzed the effects of the vaccine on the domestic dog population. Before 2003, there had been very sparse vaccination in villages surrounding Serengeti National Park. As was expected, this vaccination effort did little to curb CDV infection in either lions or domestic dogs. It was not until after 2003 when all villages to the east of Serengeti National Park and all villages within 10 km to the west of Serengeti National Park vaccinated their dogs against CDV did there exist a decrease (~5%) in CDV infections.

With CDV slightly decreased in domestic dogs due to the vaccination effort, was there a similar decrease in CDV infections in the lion populations?  Unfortunately, the sample size of lion serum that the scientists could obtain was not enough to comment on the updated magnitude of dog-lion CDV transmission. Overall, the scientists determined that CDV was still able to cycle in the lion population with very little reduction in the prevalence of the disease. However, not all is hopeless for the lion populations of Serengeti National Park. Dr. Packer’s team suggests that direct vaccination of lions may be more effective at preventing the disease. Additionally, the team suggests that advances in serological techniques would allow for increased accuracy when researching episodic diseases, such as CDV. Implementation of safe vaccines coupled with more accurate serological tests could minimize the effects of CDV outbreaks and ensure the health of the Serengeti lions.

As evident from the work of Dr. Packer and colleagues, there are threats to the conservation of the lion populations of Serengeti National Park. Not only do prides run the risk of individuals starving to death, splitting, and human-lion conflict, disease is another risk factor of living in a pride. Yet, these prides, these perfect families, come to mind when the public thinks about lions. Idealistic images of cubs play fighting or suckling from their mother are important for generating interest and compassion for African lions. One can be content with the image of the brave, courageous, elegant male lion standing on Pride Rock overlooking his kingdom, but one must simultaneously recognize the reality of the lion’s plight. Only then will conservation for lions be truly feasible.