1965. A small group of tourists and I were in Tanzania’s Oldupai Gorge listening to an African guide talk about paleontological discoveries at the gorge. He was a young man, one of five trained by paleoanthropologists Louis and Mary Leakey, and was clearly enjoying his job. However, he really came alive at the discovery site of a nearly two-million-year-old species of ape, Zinjanthropus boisei, nicknamed Nutcracker Man because of its huge teeth. “A very important find” he excitedly announced. “Why? Because this ancient ape walked upright, just like us! This same creature may also have been the first to use rudimentary stone tools!” Then, gesturing to a small concrete monument at his feet, our guide proudly stated, “And Dr. Mary Leakey found the skull of Nutcracker man right here!”
Discovery site of Zinjanthropus boisei (Nutcracker Man). It has since been reclassified, first as Australopithecus boisei and then Paranthropus boisei. (Paranthropus means Robust Ape.)
The tour guides, in place since 1963, had been taken on to deal with a sudden surge in visits stimulated by artlcles about Oldupai Gorge and Nutcracker Man published in National Geographic Magazine. Safari companies, instead of driving their clients directly from Ngorongoro to the Serengeti National Park, were beginning to include Oldupai Gorge in their itineraries. Visitor numbers, already too high to be handled directly by on-site scientists, rose from 600 in 1963 to 3,335 in 1965, initiating a rising trend that continues to the present day.
The Oldupai Gorge Site and Visitor Center is only a short diversion from the main road about halfway between two of Tanzania’s most visited tourist sites, Ngorongoro Crater and the Serengeti National Park. (Graphic by (David Bygott and Jeannette Hanby.)
Of course, increasing tourism in Tanzania primarily reflected the allure of its wildlife, especially in the Ngorongoro Conservation Area and Serengeti National Park. For instance, in 1965, four of five visitors to Ngorongoro and the Serengeti bypassed Oldupai Gorge entirely. Nonetheless, findings excavated there continued to attract visiters by keeping it in the news. Examples not included in a previous post https://storiesofeastafrica.com/2024/09/20/the-leakeys-and-their-discoveries-at-oldupai-gorge-tanzania/ include:
A 1.75 million-year-old stone circle, the oldest-known evidence of a man-made shelter from weather.
A computerized depiction of the remains of a stone circle at Oldupai. It was built by piling basaltic rocks in a ring structure and was used as a windbreak and / or base to support upright branches covered by skins and grass. (https://www.dennisrhollowayarchitect.com/Olduvai.html)
Rudimentary stone tools, associated with Australopithecus apes, that are a million years or more older than those associated with Nutcracker Man and Homo habilis (Handy Man).
An array of extinct animal species that co-existed at Oldupai with early humans, who first scavenged their remains and later hunted them. Some of these animals were remarkably large.
Weighing up to two tons and with horns up to 2 m (6.6 ft) long, Pelorovus was one of the largest bovines (and even ruminants) to have ever lived.
(Mr. A. GNU Free Documentation License.)
At 4-5 tons in weight, Deinotherium (Greek for “Terrible Animal”), was one of the largest mammals that ever lived. Not directly related to modern day elephants, it probably browsed tree foliage in open woodlands. Its tusks weren’t used for digging but rather for removing branches that hindered feeding. Isolated populations survived until 12,000 years ago, possibly hunted into extinction by modern man (Homo sapiens). (Concavenator. C.C. Attribution-Share Alike 4.0 International License.)
Almost sixty years later, tourism at Oldupai Gorge is booming, with 3,000 visits a day during Ngorongoro-Serengeti’s five-month peak tourist season. (Thus, out of the nearly 1.5 million visitors to Ngorongoro and Serengeti last year at least 450,000 visited Oldupai Gorge.)
Traffic jam in Ngorongoro crater. Most of these vehicles later continued to the Serengeti National Park, a significant number visiting Oldupai Gorge along the way. (David Bygott.)
This good news, however, brought with it a need for upgraded infrastructure, not only to handle the large numbers of visitors, but also to interpret the findings that have made Oldupai Gorge a UNESCO World Heritage Site, one of the most important in the world depicting human evolution.
This led to the construction, in 2018, by the J.Paul Getty Museum, of the Oldupai Gorge Site and Visitors Center (replacing a smaller original museum dating from the 1970’s). Situated at the very edge of the gorge and under the jurisdiction of the Ngorongoro Conservation Area Authority (NCAA), its one of the largest on-site museums in Africa.
Oldupai Gorge Site and Visitor Center.
(David Bygott.)
Backed by a view of Oldupai Gorge, an interpretive guide does his bit at the visitor center.
(David Bygott.)
Also, to better direct tourists to Oldupai Gorge, the Ngorongoro Conservation Area Authority erected a large monument depicting Nutcracker Man and Handy Man at the turnoff from the Ngorongoro-Serengeti Road. The junction is now so well marked that even tourists unaccompanied by experienced drivers and/or tour guides will notice it.
Monument to the discoveries at Oldupai Gorge of Nutcracker Man and Handy Man.
(David Bydgott.)
Thus, the NCAA has reason to be pleased about the present state of tourism at Oldupai. However, there is still room for improvement: Most Tanzanians can’t visit Oldupai Gorge. This is partly because it’s far from population centers, but also because of the NCAA’s prohibitively high entry fees (except for school field trips). Reducing entry fees for Tanzanian citizens would help the country’s small (10% of the population) but growing middle class better appreciate an important part of their (and the world’s) national heritage.
To the casual eye, Oldupai Gorge, in Tanzania’s Ngorongoro Conservation Area, seems much like any other network of scrub-littered ravines draining (whenever it rains) dry rangeland areas in the world. However, it stands out from the rest in being a special place, a UNESCO World Heritage Site yielding up artifacts invaluable to understanding early human evolution.
Oldupai Gorge (David Bygott)
Oldupai seasonal stream, the eastern half of which flows through Oldupai Gorge, drains the eastern Serengeti Plains.
(David Bygott & Jeannette Hanby)
Oldupai Gorge’s fame reflects its unique geological history:
Basalt flows from Ngorongoro’s Crater Highlands which flooded the area almost two million years ago.
The subsequent, intermittent formation of shallow alkaline lakes attractive to a rich diversity of animals, apes and early humans (Lakebed clays aided in fossilizing their remains).
Periodic volcanic eruptions in the nearby Crater Highlands which added successive layers of ash that helped preserve animal and hominid remains.*
Geologically recent earth movements which tilted the Oldupai area, creating the stream that cut the ( up to 90 meter / 295 ft deep) Oldupai Gorge, exposing an orderly sequence of nearly two million years of layered deposits containing animal, pre-human, and human artifacts.
* Hominid–Family of erect, bipedal primates including humans together with extinct ancestral and related forms and the gorillas, chimp, bonobo and orangutan.
In this way, Nature first created, and then exposed, a treasure trove of artifacts illustrating human evolutionary history.
All that was needed now was for someone to piece that history together.
Layered deposits exposed by erosion in Oldupai Gorge.
(David Bygott)
The volcanic ash comprising most of the layered deposits in the gorge came from once active volcanoes in the Ngorongoro Crater Highlands (background).
Enter Louis and Mary Leakey. Born in Kenya to missionary parents, Cambridge-educated Louis was raised among the Kikuyu, whose language he spoke and about whom he later wrote a book. For her part, Mary, despite receiving only a sporadic education, already was a woman pioneer in the fields of archaeology and paleoanthropology. Their complimentary skills, hers in excavating artifacts and his in interpreting and publicizing them, made them an effective husband-wife team.
Mary and Louis Leakey
(Smithsonian Institution Archives. Accession 90-105, Science Service Records, Image no. SIA 2008-5175)
Beginning in 1931, the Leakeys spent most of their professional careers excavating Oldupai Gorge’s layered deposits, from the lowest and oldest (1,750,000 years) to the highest and youngest (present day).
Time sequence of depositional beds at Oldupai Gorge related to environment and human evolution.
(Jeannette Hanby & David Bygott: 1992. Ngorongoro Conservation Area Guidebook. David Bygott & Co)
Their first major find, in 1959, was a large, robust ape, which Louis Leakey classified as Zinjanthropus boisei (Later classified as Australopithecus boisei, and then reclassified as Paranthropus boisei). He initially considered it to be a direct ancestor of humans because it walked upright and was found with an abundance of faunal remains and rudimentary stone tools (so named becausethe stones chosen already resembled the final product and were simply altered by chipping off a few flakes). Its massive teeth (for which it was nicknamed Nutcracker Man) implied a diet of coarse plant material.
It was a welcome discovery for the Leakeys who up to this point had, whenever Louis could find enough funds to support their work, spent 28 years at Oldupai uncovering animal fossils and crude stone tools. Zinjanthropus, however, caught the world’s attention, enabling Louis to secure proper long-term financial support–from the National Geographic Society.
A reconstruction of Zinjanthropus boisei (now Paranthropus boisei)
(Cicero Moraes and Dr. Moacir Elias Santos. Attribution-Share Alike 4.0 International License.)
But then in 1960, remains of another hominid species, discovered by Mary and her son, John, came to light. Similar in age to Zinjanthropus boisei but smaller in stature, it had smaller teeth and a larger brain, which at 600 cc was 100 cc larger than Zinjanthropus’s. This changed Louis’s mind–Here was the real direct ancestor of man, one more likely to have used stone tools. Louis named the new find, Homo habilis. Handy man.
A reconstruction of Homo habilis.
(Cicero Moraes. C.C. Attribution-Share Alike 4.0 International License.)
Still largely ape-like, H. habilis remained partially arboreal (long arms) but ate more meat (implied by its smaller teeth) than apes, and probably scavenged and hunted smaller animals, while still eating lots of plants.
A chopper associated with Zinjanthropus (Australopithecus / Paranthropus) boisei and Homo habilis remains at Oldupai Gorge.
(Picasa. CCO 1.0 Universal Public Domain Dedication.)
(Note: Present-day thinking is that Paranthropus boisei may, in fact, have been able to make rudimentary stone tools, which it used for butchering carcasses.)
Louis’s and Mary’s announcement that they had found a new species of early human provoked controversy as many experts thought they had too little evidence to support such an important conclusion. Only in the 1980’s, following Richard Leakey’s discovery, in 1972, of Homo habilis remains on the shores of Kenya’s Lake Turkana, did the scientific community fully accept that Homo habilis was a true human ancestor.
Richard, one of three Leakey children. Still young when this picture was taken in 1965, he was to become a noted paleoanthropologist in his own right.
The Leakey’s later excavation of Homo erectus (Upright Man) remains in higher level, 0.7 – 1.2 million-year-old, deposits in the gorge, created less of a stir because remains of H. erectus already had been discovered elsewhere (Java in 1892 and China in 1927). Nonetheless, finding H. erectus , Paranthropus boisei, and H. habilis, as well as 17,000-year-old artifacts of H. sapiens (Modern Man) at Oldupai made it possible to demonstrate the full sequence of human evolution at a single site.
Reconstruction of Homo erectus. Upright Man.
(Cicero Moraes. C.C. Attribution-Share Alike 4.0 International License)
At 950 cc, H. erectus had a larger brain than H. habilis. Upright Man also used more sophisticated stone tools, including hand axes and cleavers, had a more modern gait and body proportions (flat face, prominent nose) and sparse body hair, carried out coordinated hunting of medium-large animals (bovines-elephants) and possibly was the first human ancestor to use fire, have a proto-language, and practice monogamy (as inferred from males and females being similar in size). H. erectus also was the first human ancestor to spread from Africa into Eurasia.
Stone tool hand axe used by Homo erectus.
(Loctus Borg. C.C. Attribution-Share Alike 4.0 International License.)
Stone Age Homo sapiens, represented by the 17,000 year-old remains excavated at Oldupai Gorge, used stone tools tools characterized by microliths, which are smaller, finer, and sharper than stone tools made by H. erectus. They include spear points and arrow heads. Microliths were advanced technology in their day because they were portable as well as easier to make than the hafts of spears and bows. Thus, when a spear point broke it could be easily replaced without having to make a new haft.
Microliths.
(Birmingham Museums Trust. C.C. A. 2.0 Generic License.)
SUMMARY
From the early 1930’s until Mary died in 1996 (Louis died in 1972), the Leakeys were responsible for most of the stone tool and hominid fossil discoveries at Oldupai Gorge (and Laetoli). These discoveries, which were major contributions to understanding human evolution, proved that:
Humans were far older than previously believed
Human evolution centered in Africa rather than Asia, as earlier discoveries had suggested
The earliest humans coexisted with a species of ape which, like them, walked upright.
They also demonstrated the relationship between the evolving features (especially brain size) of increasingly modern species of humans and the sophistication and frequency of use of stone tools.
Louis and Mary Leakey worked at Oldupai Gorge for 41 and 65 years respectively. It was time well spent.
REFERENCES
Bygott, D. 1992. Ngorongoro Conservation Area Guidebook. Tanzania Printers Ltd.
(This, the first of two posts on the Ngorongoro Maasai, describes them as they were in the 1960’s. The second, coming in a few months, will describe their present situation, over half a century later.)
Kapenjiru, 1965. That night we ate goat meat roasted over a campfire while Solomon ole Saibull regaled us with stories, including how the agro-pastoral Arusha, who had originated from elements of the Kisongo, the principle sub-tribe, or section, of the Maasai, had, a few hundred years ago, pushed the agricultural Meru people from some of their land on Mt. Meru. Even more interesting, however, because we were near the place concerned, was his story about how the Kisongo defeated another sub-tribe of the Maasai, the Lumbwa, for possession of the Crater Highlands. The decisive battle took place on the rim of Empakaai Crater.
“What happened to the defeated warriors?”
Solomon shrugged, “What do you think? They were thrown over a cliff.”
Maasai murrani or warrior. Photo by Herman Dirschl.
Given the propensity in the nineteenth century for the various elements of the Maasai to slaughter one another, the Kisongo and Lumbwa might just as easily have fought over possession of barren rock. The Ngorongoro Crater Highlands, however, were a prize worth fighting for because they contained prime dry season grazing. Furthermore, in times of drought, they were a refuge for herders living in he surrounding, drier rangelands (or at least those on good terms with the Crater Highland’s occupants).
Grasslands (yellow) of the Serengeti Plains comprise the largest area of rangelands in the Ngorongoro Conservation Area. However, the grasslands of the Crater Highlands can support 2-5 times as many livestock and people. Map courtesy of David Bygott and Jeannette Hanby.
Thus, it isn’t surprising that the rangelands of the Ngorongoro Conservation Area have been inhabited by livestock-keeping peoples for a very long time. The Iraqw or Mbulu people first introduced livestock, and possibly also agriculture, to the area some 2,000-2,500 years ago. Around 1,000-1,500 BC, they were replaced by the Datog (or Barabaig, Tatua) who were in turn driven out by the Maasai sometime around 1850.
A deeply worn livestock trail on Makarut Mtn, indicative of thousands of years of use by herds of livestock. Pictured: Herman Dirschl, Canadian Wildlife Service.
A century and a half later, Maasai pastoralists still occupy the Crater Highlands and adjacent eastern Serengeti Plains. Most are Kisongo Maasai. The smaller Serenget and Salei sections occupy the eastern Serengeti Plains and Oldoinyo Gol Mtns. Many of these Maasai pastoralists were moved there from the western Serengeti Plains in what is now the Serengeti National Park.
When I was at Ngorongoro in the mid-1960’s, the Maasai still largely subsisted on milk, meat, and skins from their livestock. However, whenever milk was scarce, as in the late dry season and during droughts, they also ate grains obtained from dukas (shops) or neighboring agro-pastoralists, such as the Arusha Maasai, who also farmed. They raised goats, sheep, and donkeys (the latter for hauling things), but strongly emphasized cattle, which were the principal producers of milk. In the wet season when milk was most abundant, the Maasai lived only on it. Cattle, primarily bulls, were slaughtered for meat only on special occasions, such as ox-feasts helped by the warriors. Instead, the Maasai ate goats or sheep when they wanted meat.
Donkeys being used as pack animals in the Crater Highlands. The 6-7,000 ft (2,000-2,135 m) high grasslands pictured here were used for dry season grazing. In the background is 11,811 ft (3,600 m) Lolmalasin Mtn.
Having large herds was important. The more animals, the greater chance some would survive to rebuild the herd after a drought, outbreak of disease, or major stock theft. Also, the more milk a pastoralist’s herd produced, the more people he could support. (Human carrying capacity is maximized by emphasizing milk, rather than meat in diets: Milk has a higher caloric value.) Having many cattle also conferred prestige–he with many animals was an important man.
As were their predecessors, the Datog, and probably also the Iraqw/Mbulu before them, the Maasai were transhumant pastoralists, who moved between dry season and wet season pastures (the latter in the eastern Serengeti Plains and floor of the Rift Valley). Thus, when water sources dried up and forage was depleted by grazing on the lower, drier rangelands, livestock were returned to dry season pastures in the highlands where water and forage, the latter often still green and nutritious, were still abundant.
Cattle on wet season pasture in the Olbalbal, a large, shallow depression watered by outflow from Oldupai Gorge.
A Maasai’s home, or boma, consisted of huts encircled by a stockade of cut thorn bushes or upright logs (depending on the local vegetation), which also served as a corral for livestock. Constructed of frames of poles plastered with fresh cow dung mixed with mud and cow urine, the huts were dark and smoky inside. Nonetheless, they were remarkably free of flies and mosquitoes, and fluctuated little in temperature day and night.
A view of the Olbalbal Depression and Crater Highlands from a Maasai (Serenget or Salei) boma in the eastern Serengeti Plains.
Bomas were abandoned when cow dung and parasites reached unacceptable levels. Long after fences and huts disappeared, old boma siteswere marked by dense stands of dark green nettles and other plants growing on their nutrient-rich deposits of dung.
Building and maintaining a boma’s huts were the responsibility of the women, who also did the milking, gathered water and wood, cooked, cared for the children, attended calving, and dealt with night-time disturbances within the herd of corralled livestock.
Maasai ladies on the rim of Ngorongoro Crater. Note the brand new (and therefore almost pristine white) Amerikani cloth, a cheap, bleached calico named for American traders who exported it to East Africa in the mid 19th century.
Young boys and girls did the herding, assisted by warriors and elders whenever herding and watering became difficult. After circumcision, the boys became warriors or murran, who carried out difficult, long-distance herd movements, defended their locality, recaptured stolen cattle, and (at least in the past) raided other tribes, including the neighboring Mbulu and Sukuma, for livestock. Exempt from regular herding, murran hunted lions, feasted on ox-meat, consorted with young, unmarried girls, and formed strong, lasting bonds with their age-mates. Boys looked forward to becoming murran, and elders fondly remembered their time as warriors. However, like it or not, by their mid-40’s, all murran became married elders responsible for managing their herds, and taking part in political and religious affairs.
Maasai murran watching an airplane being refueled on the floor of Ngorongoro Crater.
Despite what a European visitor to a Maasai boma, swatting away flies that bred in the accumulated dung on the stockade floor, might think, the Maasai felt they were living the ‘Good Life.’ Proud of their reputation for being fierce warriors and possessing an abundance of that which, in their eyes, any sane person would want, i.e., cattle, they had everything they desired.
Thus, the Maasai have tended to be conservative and resistant to change, such as in educating children and selling cattle at livestock markets. This attitude has frustrated government officials, both pre-and post-independence, and given the Maasai a reputation for being backward.
Even so, despite contributing little to the regional economy, subsistence pastoralism, prior to the advent of tourism, was the major land use throughout most of what is now the Ngorongoro Conservation Area.
PRINCIPAL REFERENCE.
Homewood & Rodgers. 1991. Maasailand Ecology: Pastoralist Development and Wildlife Conservation in Ngorongoro, Tanzania. Cambridge University Press.)
Suddenly, ahead, a soft clunk sounded. Cowbell! The chief forest guard, an older man whose stiff curly hair was sprinkled with white, whispered that we should be especially quiet now. He and I were leading a group of forest guards and game scouts on a patrol for livestock trespassing in the forest reserve. Easing our way slowly around stumps, we carefully pushed branches aside to look ahead, studying each clearing before entering it, tense with anticipation.
“Wewe! Simama!” You! Stop!
“Kamata yeye!” Catch him!
Guards and scouts alike charged into the bushes . . .
Buffaloes by My Bedroom: Tales of Tanganyika.
Now that I’ve grabbed your attention, and you’re wondering what happens next, I’m taking the opportunity to introduce some important background information before resuming the story. In my previous post, I promoted the scenery and wildlife of Tanzania’s Ngorongoro Conservation Area (NCA) to the extent that some readers probably wondered why, if it was so great, it wasn’t a national park. The answer is that it once was. From 1951-1959 it comprised the western part of the Serengeti National Park.
However, difficulties encountered from having people, in this case Maasai pastoralists and non-Maasai cultivators, living in an area strictly devoted to the conservation of wildlife forced the then territorial government to remove the eastern Serengeti Plains and Crater Highlands from the park and place them within a separate entity, the Ngorongoro Conservation Area. This allowed the Maasai to continue their pastoral existence while the government controlled the use of certain key areas, including Ngorongoro and Empakaai craters, the eastern Serengeti Plains, and the archeological site at Oldupai Gorge. Thus, the Ngorongoro Conservation Area became a multiple-use management area, the only one in Tanzania to protect wildlife while allowing human habitation.
A relief map of the Ngorongoro Conservation Area (NCA). Yellow (grassland), gray (bushland and woodland), green (forest), and brown (agriculture). Courtesy of David Bygott and Jeannette Hanby.
The NCA’s montane forests provide an example of multiple use. Ranging in elevation from 5,000-10,000 ft (1,600-3,000 m), most forest cover occurs within the Northern Highlands Forest Reserve, a 50 mile (80 km) band of green on the southern and eastern slopes of the Crater Highlands. Here, monsoonal air masses off the Indian Ocean 200 miles (320 km) away are forced to rise, cool, and condense into mist, clouds, and rainfall. This, together with cool high-elevation temperatures, is conducive to a moist environment. Thus, unlike elsewhere in the Ngorongoro Conservation Area, where green foliage is a seasonal phenomenon, montane forest remains green throughout the year.
Lichens and other epiphytes trailing from branches are associated with abundant mist.
The first thing that struck me upon entering an undisturbed (by cutting, fire, etc.) stand of montane forest was the dim light filtering through the dense canopy 50 to 60 feet overhead. Only here and there did a beam of sunlight slant down to brighten a patch of he forest floor. The next was how a dense understory of shrubs and small trees often hampered my movements, while at other times it was so scattered (or absent) that I could walk freely across the forest floor, the latter made soft and springy by several inches of decomposing organic matter. This made it easier to appreciate the trees, which I differentiated by their many types of bark, which ranged from silver to black, and from smooth to rough, including fissured, corrugated, scaly, flaking, and peeling.
Montane forest within the Northern Highlands Forest Reserve.
Ngorongoro’s forests comprised many tree and shrub species. Some were worthy of note, if only for their descriptive names, including pillar wood (Cassipourea malosana), cheese wood (Pittosporum viridiflorum), brittle wood (Nuxia congesta), and black ironwood (Olea capensis). The latter, also called Elgon olive (for Mt. Elgon on the Kenya-Uganda border), stands out because it is so dense and heavy that it will not float. (Check out the world’s ten heaviest woods at https://www.wood-database.com/top-ten-heaviest-woods/).
Cape chestnut.
Cape chestnut (Calodendron capense) has beautiful flowers. East African pencil cedar (Juniperus procera) is the largest species of Juniper in the world. Mountain bamboo (Arundinaria alpina) is a very large woody grass. The fresh leaves and shoots of Khat or Miraa (Catha edulis) were chewed as a stimulant throughout much of eastern Africa, especially the Horn of Africa. Podo (Podocarpus milanjianus), African mahogany (Entandrophragma angolense), and East African pencil cedar woods were highly prized for construction and other uses. However, these species were not abundant enough in Ngorongoro’s forests to attract commercial operations.
East African pencil cedar forms pure stands in high-elevation ravines within the NCA. The wood of this species was once extensively used to make pencils. Photo by Sema Tu. Creative Attribution-Share Alike 4.0 International License.
Dense stands of mountain bamboo on Oldeani Mountain (Oldeani is the Maasai word for bamboo). Mountain bamboo has the strange habit of gregariously dying out over large areas every 15 to 40 years or so.
In the case of the Northern Highlands Forest Reserve, a lack of commercially exploitable tree species didn’t matter because its principal purpose, ever since its establishment in 1927, was the protection of forest catchments for water production. Thus, although the forest fulfilled local domestic wood product needs, such as building poles, and firewood, it was far more important for the water (twenty-four small streams and seven springs) it provided beyond its boundaries to coffee and wheat estates, tourist facilities, Mbulu farmers, and Maasai pastoralists. Water infiltrating into the forest’s soils also sustained important groundwater forest habitat over ten miles (sixteen km) away in Lake Manyara National Park (see earlier post, On the Road to Ngorongoro: Part III)
Farms abutting the Northern Highlands Forest Reserve. Most are new since 1965. Photo by David Bygott.
However, the main reason for including the Northern Highlands Forest Reserve in the Serengeti National Park (1n 1951) and then the Ngorongoro Conservation Area (1959), was its value as wildlife habitat, especially for buffaloes, elephants, and rhinos. At the time it was thought that the large animals living in the forest seldom left it, although tourists would often see them along the road. However, subsequent studies revealed that rhinos often traveled back and forth between the forest and the floor of Ngorongoro Crater. Furthermore, before their access routes were blocked by new farms, elephants once moved between the Northern Highlands Forest Reserve and the Rift Valley floor near Lake Manyara .
Picture encountering this while pushing your way through dense undergrowth. Photo by David Bygott.
Finally, the montane forests of Ngorongoro supported yet another use, a great deal of it illegal. Much of the forest within the Northern Highlands Forest Reserve was discontinuous, separated by secondary scrub and grassy glades. Possible causes included cultivation carried out many years ago, fire, and grazing/browsing by livestock. Maasai herders were sometimes allowed, under permit, to pasture their livestock in forest glades during droughts. Fires, set in the glades to remove dry grass often escaped into the forest, damaging trees. Browsing by livestock destroyed tree seedlings. Trampling hooves compacted soils, reducing their ability to absorb rainfall. These impacts had the potential to seriously reduce the forest’s water catchment value.
It was for this reason that Henry Fosbrooke, the conservator of the Ngorongoro Conservation Area, wanted me, the NCA’s assistant conservator (forests), to stop forest trespass by Maasai livestock. “The forest guards aren’t doing their job properly. You must shape them up.” This explains why, in the first paragraph of this post, I and a group of forest guards and game scouts are portrayed sneaking through the trees trying apprehend trespassing herders and their animals. We now return to that story.
Cattle illegally grazing a glade within the Northern Highlands Forest Reserve. The tall grass, manyatta grass (Eleusine jaegeri), is unpalatable to livestock. The other grasses have been grazed and trampled so heavily that in places only bare soil remains, Fires set in the glade have, in the past, burned away parts of the adjacent forest, giving it an irregular, often open appearance.
The person caught by the scouts and guards was a Maasai herd boy. Soon afterward, they caught another herder, and then another. We nabbed six herders and roughly a thousand cattle that day. Together with those apprehended a few days earlier in another part of the forest, this made ten people and two-thousand cattle. No wonder the forest reserve was degraded. Three days later, the herders and I appeared in a magistrate’s court in the town of Karatu where the African magistrate levied such a small fine that a relative of the herders paid it on the spot.
“They treat these fines as grazing fees” whispered a senior staff member of the NCA, Solomon ole Saibull, into my ear. “They would willingly pay even greater amounts.” Keeping his voice low, he told me that in his experience, African magistrates seldom imposed heavy fines for forest trespass because they didn’t think it was a very important offense. Most Africans, educated or not, considered forest reserves to be relicts of colonialism, set aside by the ‘wazungu’ for their own purposes, not the African’s. “He [the magistrate] probably thinks the reserve should be converted to farms,”Solomon hissed.
Buffaloes by My Bedroom: Tales of Tanganyika.
Here was another factor contributing to degradation within the forest reserve. Now I understood why the forest guards weren’t interested in braving elephants and buffaloes to catch trespassing livestock. Why bother if it did no good? Consequently, despite our efforts, I and the forest guards were to have little impact on the numbers of trespassing livestock during my time at Ngorongoro.
Maasai herders caught trespassing with their livestock in the Northern Highlands Forest Reserve. They were so engrossed in chewing honeycombs that they didn’t hear us approach.
We now jump ahead thirty years. The Ngorongoro Conservation Area Authority (NCAA) general management plan, published in 1996, emphasized, among other things, the continuing need to better control both fire and forest grazing. Apparently, the NCA foresters who came after me also had trouble controlling forest trespass.
Furthermore, the management plan also stated that Ngorongoro’s forests were under considerable pressure from illegal harvesting of trees for local domestic use. This to the extent that Mafu (Fagaropsis angolensis) and Khat or Miraa (Catha edulis) were listed as ‘threatened’ tree species in the Ngorongoro Conservation Area due to extensive logging of the former for building materials, and heavy harvesting of the latter for its drug properties.
This undoubtedly reflects rapid population growth, both within and outside the Ngorongoro Conservation Area (Tanzania’s population approximately tripled from 1960 to 1996), which has created a higher demand for forest products. (For information on population growth in Tanzania, go to https://worldpopulationreview.com/countries/tanzania-population.)
I wonder what the situation is now, twenty-six years later.
Man, it was cold! Dense fog had formed during the night to wrap my little house on the rim of Ngorongoro Crater in a silent, gauzy blindfold. Peering through the window, I shivered, something I hadn’t expected to do so close to the equator. But then I also hadn’t expected to be living at 7,000 ft elevation ( 2,134 m). On the other hand, a fire in the fireplace was beginning to making its presence felt. Pulling up a chair to huddle near its warmth, I reviewed what I had learned from my first staff meeting as the Ngorongoro Conservation Area’s new assistant conservator (forests).
Ngorongoro’s forests and crater rim are often cold and foggy during the wet and early dry seasons. Photo by David Bygott.
Wearing a sweater to ward off the cool morning air, Henry Fosbrooke, conservator of the Ngorongoro Conservation Area, addressed the assembled officers from behind his sturdy African olive-wood desk. He confirmed that I was to oversee a large forest reserve, ten forest guards, a tree nursery, and a small fuelwood plantation of eucalyptus trees. He emphasized the need to stop livestock trespassing in the forest reserve, but he also wanted me to locate game-viewing tracks for tourists in and around Ngorongoro Crater. Then, he said something I hadn’t expected. Pausing to wipe his glasses, Henry admitted that neither activity would be possible until he obtained more vehicle fuel and a bulldozer. In the meantime I was to take over the conservation area’s rain gauge system and set up a meteorological station near the office. Also, I was informed, Richard Leakey had ordered a lorry load of bamboo for the archeological site at Oldupai Gorge; buffaloes had broken the fence around the tree plantation again; and I needed to familiarize myself with the files in my office. After the meeting, John Goddard, a Canadian wildlife biologist, and my neighbor, invited me to accompany him into the crater while he studied rhinos. Checking the fog again through the window, I decided I was in little danger of being bored. I also decided to borrow a heavy sweater from John.
In fact, I was never to be bored for long at Ngorongoro, especially when my official duties expanded to take me throughout the entire Ngorongoro Conservation Area. And, what a place it was, too!
A relief map of the Ngorongoro Conservation Area. Yellow (grassland), gray (bushland and woodland), green (forest), and brown (agriculture). Courtesy of David Bygott and Jeannette Hanby (more about them later).
Bracketed by three rift valley lakes, Manyara, Eyasi, and Natron, the Ngorongoro Conservation Area, at 3,200 sq. miles (8,300 sq. k), is nearly as large as Yellowstone National Park, which it rivals in scenic appeal and biological diversity (both are UNESCO World Heritage Sites). And how could it not what with the high peaks, plateau, and volcanic calderas of the Crater Highlands in the east, the vast sweep of the world-famous Serengeti Plains in the west, and, in the southwest, Lake Eyasi and the rugged Eyasi Escarpment (not to mention extensive areas of thorn tree bushland and woodland).
Empakaai Crater dramatically backdropped by Oldoinyo Lengai, an active volcano rising from the rift valley floor. At 10,700 ft (3,200 m) elevation and 980 ft (300 m) deep, Empakaai is highly scenic. Views from the crater rim often include Mt. Kilimanjaro 90 miles (145 km) to the east.
The Melinda grasslands, a high plateau (including the Embulbul Depression) in the rain shadow of >11,000 ft (3353 m) Loolmalison and Olosirwa mtns. The trails reflect many millennia of use by wildlife and, for at the least the last 2,000 years, livestock of a succession of pastoral peoples. The area is now grazed by Maasai livestock. The distant peak is Oldeani Mountain.
Composed of numerous species, including bamboo on Oldeani Mtn., montane evergreen forest is sustained by high rainfall, primarily on the southern and eastern flanks of the Crater Highlands. It is a major habitat for rhino, buffalo, and elephant. The pictured tree is a species of Dracaena.
Thorn tree woodland on the drier, west slope of the Crater Highlands. The dominant tree here is a species of Commiphora. This is giraffe and impala country. The eastern Serengeti Plains are visible in the distance.
Migratory wildebeest on the eastern Serengeti Plains. During my time at Ngorongoro (1964-67), approximately 400,000 wildebeest moved onto the eastern plains every wet season to graze and calve, only returning to the Serengeti National Park when the grass and water dried up. (In 1980 they numbered around 1,400,000.)
The Eyasi Escarpment rising 1300 ft (400 m) above Lake Eyasi (barely visible at far left). Shallow Lake Eyasi fluctuates widely in area both seasonally and annually. Flamingoes and waterbirds visit the lake. Agriculturalists, Hadza hunter-gatherers, and Datoga pastoralists use the adjacent semi-arid thorn bush flats.
Pretty cool, eh?
(The authors/artists Jeannette Hanby and David Bygott lived for nineteen years in Mangola Village near Lake Eyasi’s eastern shore just a few miles east of the area pictured above. Their books, Spirited Oasis: Tales from a Tanzanian Village, and Beyond the Oasis: Safaris of Song and Stone, relate their experiences during this time. Check them out at https://www.youtube.com/watch?v=MU1L-sZJs8Q; David and Jeannette tell a good story.)
(For more information on the present-day Ngorongoro Conservation Area see https://www.ncaa.go.tz/
