Inscription year 1987 Country Tanzania



At 5,963 meters Kilimanjaro is the highest point in Africa. This massive volcano stands in splendid isolation above the surrounding plains, with its (fast-melting) snowy peak looming over the savannah. The mountain is encircled by mountain forest. Numerous mammals, many of them endangered species, live in the Park.




Kilimanjaro National Park


1987: Inscribed on the World Heritage List under Natural Criterion vii.


The UNESCO World Heritage Committee issued the following Statement of Outstanding Universal Value at the time of inscription:

Brief Synthesis

Kilimanjaro National Park covering an area of some 75,575 ha protects the largest free standing volcanic mass in the world and the highest mountain in Africa, rising 4877m above surrounding plains to 5895m at its peak. With its snow-capped peak, the Kilimanjaro is a superlative natural phenomenon, standing in isolation above the surrounding plains overlooking the savannah.

Criterion vii: Mount Kilimanjaro is one of the largest volcanoes in the world. It has three main volcanic peaks, Kibo, Mawenzi, and Shira. With its snow-capped peak and glaciers, it is the highest mountain in Africa. The mountain has five main vegetation zones from the lowest to the highest point: Lower slopes, montane forest, heath and moorland, alpine desert and summit. The whole mountain including the montane forest belt is very rich in species, in particular mammals, many of them endangered species. For this combination of features but mostly its height, its physical form and snow cap and its isolation above the surrounding plains, Mount Kilimanjaro is considered an outstanding example of a superlative natural phenomenon.


Kilimanjaro National Park, established in 1973, initially comprised the whole of the mountain above the tree line and six forest corridors stretching down through the montane forest belt. At the time of inscription in 1987, the main pressures affected mostly the forest reserve which acted as a buffer zone to the park. The World Heritage Committee recommended extending the national park to include more areas of montane forest. Following a 2005 extension, the National Park includes the whole of the mountain above the tree line as well as the natural forest (montane forest) which was under Kilimanjaro Forest Reserve, and as such fulfils the criteria of integrity. It is important that the extension of the National Park be reflected in the boundaries of the property.

The wildlife of the property is important to the experience of Kilimanjaro, although the property is not inscribed in relation to biodiversity criteria. Pressures on elephant, buffalo and antelope, and logging in the Forest Reserve area, were noted as integrity concerns at the time of inscription. The park is connected to Amboseli National Park, however corridors to Arusha National Park and Tsavo National park have been encroached, impacting on wildlife migration. 

Protection and Management Requirements

Kilimanjaro National Park is protected under national legislation as a National Park and a management plan is in place. The property requires an effective and managing organization, including sufficient well equipped ranger presence to be able to carry out surveillance and implementation of the management plan. A key management issue is maintaining the aesthetic quality of the property as a spectacular natural site. Protecting its visual integrity and sustaining its natural integrity are key management issues.  Key viewpoints to the property also need to be protected, including from Arusha and Amboseli where the most famous views of the property can be seen. An effective programme of research and monitoring of the property is also required.

Threats to the property include increasing and cumulative stress from sources such as adjacent land uses, downstream effects of air and water pollution, invasive species, fire and climate change. The glaciers of the property are vulnerable to retreat, and are cited as a feature of particular vulnerability to global climate change. The impacts from these threats need to be closely monitored and minimized. Tourism poses a significant threat and careful planning of related infrastructure and access development is required. Human pressure on the property needs to be managed, which can result otherwise in illegal harvest of its resources, encroachments to park boundary and blockage of migratory routes and dispersal areas. Education programmes and integration of park management with all involved partners and stakeholders, including the surrounding rural population, is essential.


II National Park


Somalian (3.14.07) / East African Highlands (3.21.12)


The National Park and Forest Reserve on Mount Kilimanjaro lie very near the border between Tanzania and Kenya north of Moshi in the north centre of the country. The National Park comprises the whole of the mountain above 2700m, including some of the montane forest, and six access corridors through the forest belt below. The whole area lies between 2° 45' to 3° 25'S and 37° 00' to 37° 43'E.


1910s: Mt Kilimanjaro and its forests declared a game reserve by the German colonial government;

1921: The area was gazetted as a Forest Reserve, confirmed by subsequent legislation;

1973: The mountain above the tree line (\~2700m) reclassified as a National Park by Government Notice 50 and opened to public access in 1977.


Government, in Kilimanjaro province. Administered by the Tanzania National Parks Authority.


National Park: 75,353 ha, surrounded by a Forest Reserve of 107,828 ha.


1,830m (Marangu Gate) to 5,895m (Kibo,Uhuru Peak)


Kilimanjaro is a giant stratovolcano and one of the largest volcanoes and largest isolated mountains in the world. It is the highest mountain in Africa, rising 4,877m above the surrounding savanna plains to 5,895m and its base covers an area of about 388,500 ha. It stands alone but is the largest of an east-west belt of volcanoes across northern Tanzania. It has three main volcanic peaks of varying ages lying on an east-southeast axis, and a number of smaller parasitic cones. Kibo (5,895m), is the most recent summit, having last been active in the Pleistocene and still has minor fumaroles. It consists of two concentric craters of 1.9 x 2.7 km and 1.3 km in diameter with a 350m deep ash pit in the centre. The highest point on the mountain is the southern rim of the outer crater. The rugged erosion-shattered peak of Mawenzi (5,149m) lies to its east. The top of its western face is fairly steep with many crags, pinnacles and dyke swarms. Its eastern side falls in cliffs over 1000m high in a complex of gullies and rock faces, rising above two deep gorges, the Great Barranco and the Lesser Barranco. Between Kibo and Mawenzi there is a plateau of some 3,600 ha, called the Saddle, which forms the largest area of high altitude tundra in tropical Africa. To the west, the oldest peak Shira (3,962m) of which only the western and southern rims remain, is a relatively flat upland plateau of some 6,200 ha, the northern and eastern flanks having been covered by later material from Kibo. There are deep radial valleys especially on the mountain’s western and southern slopes.

The mountain is a combination of both shield and volcanic types of eruption. Over time different flows have produced a variety of different rock types. The predominant rock types on Shira and Mawenzi are trachybasalts; the later lava flows on Kibo show a gradual change from trachyandesite to nephelinite. There are also a number of intrusions such as the massive radial and concentric dyke-swarms on Mawenzi and the Shira Ridge, and groups of nearly 250 parasitic cones formed chiefly from cinder and ash. There is evidence of past glaciation on all three peaks, with morainic debris found as low as 3,600m. However, since 1912 the mountain has lost 82% of its ice cap and since 1962, 55% of its remaining glaciers. Kibo still retains permanent ice and snow and Mawenzi also has patches of semi-permanent ice, but the mountain is forecast to lose its ice cap by 2015. The mountain remains a critical water catchment for both Kenya and Tanzania but as a result of the receding ice cap and deforestation, several rivers have dried up, affecting the forests and farmland below.


There are two wet seasons, November to December and March to May, with the driest months between August to October. Rainfall decreases rapidly with increase in altitude; mean precipitation is 2300mm in the forest belt (at 1,830m), 1300mm at Mandara hut on the upper edge of the forest (2,740m), 525mm at Horombo hut in the moorland (3,718m), and less than 200mm at Kibo hut (4,630m), giving desert-like conditions. The prevailing winds, influenced by the trade winds, are from the southeast. North-facing slopes receive far less rainfall. January to March are the warmest months. Conditions above 4000m can be extreme and the diurnal temperature range there is considerable. Mist frequently envelops much of the massif but the former dense cloud cover is now rare. The ice cap and glaciers are in rapid retreat, but this local evidence of climate warming may also be due to the loss of humidity caused by long deforestation of the mountain’s foothills (Thompson et al., 2003), by farm clearances and by fires set by honey-harvesters.


The mountain has five main vegetation zones: savanna bushland at 700-1,000m (on south slopes) and 1,400-1,600m (on north slopes), densely populated sub-montane agro-forest on southern and south-eastern slopes, the montane forest belt, sub-alpine moorland and alpine bogs. Above this is alpine desert. The montane forest belt circles the mountain between 1,300m (±1,600m on the drier north slopes) to 2,800m. Forests above 2,700m are within the National Park. According to Lambrechts et al. (2001) there are 2,500 plant species on the mountain, 1,600 of them on the southern slopes and 900 within the forest belt. There are 130 species of trees with the greatest diversity being between 1,800 and 2,000 meters. There are also 170 species of shrubs, 140 species of epiphytes, 100 lianas and 140 pteridophytes.

The forest between 1,000 and 1,700m in the south and east has been extensively farmed with remnants of natural forest left only in deep gorges. In the drier west there are large estates and ranches where some natural habitat still survives; the north and northwestern slopes are dominated by plantations of exotic Pinus species. Dominant species of the submontane forest between 1,300-1,600m in the west and 1,600-2,000m in the north are Croton megalocarpus and Calodendron capense. Dominant in the lower to middle montane forest between 1,600-2,200m in the west and 2,000-2,400m in the north is Cassipourea malosana. On the southern and southeastern slopes from 1,600 to 2,100m the dominant lower montane forest species is the commercially valuable camphorwood Ocotea usambarensis; from 2,100 to 2,400m the dominant middle montane forest species are camphorwood Ocotea usambarensis with yellowwood Podocarpus latifolius, a large evergreen, with the tree fern Cyathea manniana, sometimes growing to 7m high. From 2,400 to 2,800m the dominant upper montane forest species are Podocarpus latifolius with Ocotea usambarensis. The subalpine southern and southeastern slopes between 2,800-3,100m have forest of Hagenia abyssinica with Podocarpus latifolius and Prunus Africana; and on the north slopes Juniperus procera - Podocarpus latifolius forest with Hagenia abyssinica. Above 2,800m to the edge of the tundra at 3,500m is Erica excelsa forest.

There is no bamboo zone, nor a Hagenia - Hypericum zone. Above about 4,600m, very few plants are able to survive the severe conditions, although specimens of Helichrysum newii have been recorded as high as 5,760m (close to a fumarole), and mosses and lichens are found right up to the summit. The upland moor consists primarily of heath/scrub plants, with Erica excelsa, Philippia trimera, Adenocarpus mannii, Protea kilimandscharica, Stoebe kilimandscharica, Myrica meyeri-johannis, and Myrsine africana. Grasses are abundant in places, and Cyperaceae form the dominant ground cover in wet hollows. On flatter areas between the upland moor and the forest edge are areas of moorland or upland grassland composed of Agrostis producta, Festuca convoluta, Koeleria gracilis, Deschampsia sp., Exotheca abyssinica, Andropogon amethystinus, and A. kilimandscharicus, with scattered bushes of Adenocarpus mannii, Kotschya recurvifolia and Myrica meyeri-johannis. Various species of Helichrysum are found in the grasslands and in the upland moor. Two distinct forms of giant groundsel occur on the upper mountain: Senecio johnstonii cottonii, endemic to the mountain and only occurring above 3600m, and S.johnstonii johnstonii, which occurs between 2,450m and 4,000m, showing two distinct forms. At all altitudes Senecio favours the damper and more sheltered locations, and in the alpine bogs is associated with another conspicuous plant, growing up to 10m tall, the endemic giant lobelia Lobelia deckenii. Below the tree line, the Park includes six corridors through the forest to the mountain foot.


The whole mountain including the montane forest belt, part of which extends into the National Park, is very rich in species: 140 mammals, (87 forest species), including 7 primates, 25 carnivores, 25 antelopes and 24 species of bat (Lamprecht et al., 2002). Above the treeline at least seven of the larger mammal species have been recorded (Child, 1965), although it is likely that many of these also use the lower montane forest habitat. The most frequently encountered mammals above the treeline are eastern tree hyrax Dendrohyrax validus (VU), grey duiker Sylvicapra grimmia and eland Tragalaphus oryx, which occur in the moorland, with bushbuck T. scriptus and red forest duiker Cephalophus natalensis being found above the treeline in places, and central African savanna buffalo Syncerus caffer aequinoctialis which occasionally moves out of the forest into the moorland and grassland. An estimated 220 elephants Loxodonta africana (VU) are distributed between the Namwai and the Tarakia Rivers (Tanzania National Parks, 1993) and sometimes occur on the higher slopes. Insectivores occur and rodents are plentiful above the tree line, especially at times of population explosion, although golden moles (Chrysochloridae) are absent. Three species of primate are found in the montane forests, blue monkey Cercopithecus mitis albogularis, eastern black-and-white colobus monkey Colobus guereza caudatus and bushbaby Galago species; among mammals found there are leopards Panthera pardus as well as some of the species listed above. Abbot's duiker Cephalophus spadix (EN) is restricted to Kilimanjaro and some neighbouring mountains. Eastern black rhinoceros Diceros bicornis (CR) is now extinct in the area and Chanler’s mountain reedbuck Redunca fulvorufula chanleri (VU) is probably extinct (Lamprecht et al., 2002).

The Park lies within one of the world’s Endemic Bird Areas. 179 highland species of birds have been recorded for the mountain, although species recorded in the upper zones are few in number. These include occasional lammergeier Gypaetus barbatus, moorland chat Cercomela sordida, Hunter's cisticola Cisticola hunteri, and scarlet-tufted sunbird Nectarinia johnstoni. White-necked raven Corvus albicollis is the most conspicuous bird species at higher altitude. The forest has several notable bird species including wattled ibis Bostrychia carunculata Kenrick’s starling Poeoptera kenricki and Abbot's starling Cinnyricinclus femoralis (VU), which has a very restricted distribution. Pallid harrier Circus macrourus and lesser kestrel Falco naumanni (VU) have been seen on the west slopes. The Kilimanjaro swallowtail butterfly Papilio sjoestedti, is restricted to Kilimanjaro, Ngorongoro and Mount Meru, and the subspecies P.s. atavus is found only on Kilimanjaro.


With its snow-capped peak standing alone almost 5km above the surrounding plains Mt. Kilimanjaro is a superlative natural feature and a powerful symbol of the country. It is also an essential water catchment for the surrounding countryside and protects wildlife and a unique endemic flora. The Park lies within the Conservation International-designated Eastern Afromontane Conservation Hotspot, is a WWF Global 200 Eco-region, a WWF/IUCN Centre of Plant Diversity, and in one of the world’s Endemic Bird Areas.


The local tribe is the Chagga, Bantu who arrived about 300 years ago as nomads and settled as farmers, terracing the fertile slopes. The name Kilima Njaro means shining mountain‘ in Swahili, and the Chagga know it as the Home of God. It was first reported in the west by a missionary in 1848, and first climbed by the german H.Meyer in 1889, with a Chagga guide.


The area surrounding the mountain is quite heavily populated principally by the Chagga, and the northern and western slopes of the Forest Reserve surrounding the National Park has 18 medium to large ‘forest villages’. Although it is illegal, these people still use the forest for many household and medicinal products, for fuelwood, small scale farming, beekeeping, hunting, charcoal production and logging. Some 12% of the forest is plantation, some almost reaching to the moorland. The shamba system of tree plantations interplanted with crops comprises over half the planted area but over half of it is not replanted with trees at all (Lamprecht et al., 2002).


The National Park has been developed with tourism in mind, and approximately 10,800 people visit the Park each year. The mountain can be climbed by non-climbers and the tour is greatly increasing in popularity. All visitors climbing the mountain must have a guide preferably from a licensed tour operator and take precautions against mountain sickness. Although there are six routes up the mountain, 91% of all hikers use the Marangu Trail. There are three huts for climbers on this trail: Mandara, Horombo and Kibo. Food, bedding and porters are provided by tour operators. There is a mountain rescue team at the Park headquarters and at each of the huts At Marangu there are a lodge, a hostel, a shop and equipment rental (National Park Service, pers. comm., 1995).


A variety of scientific studies has been conducted within the Park, although there are no special facilities. The local Chagga tribe was extensively studied in the 19th century by a german missionary, B.Guttmann (Jäschke, 1980). There has been long-term geological, hydrological and vulcanological research by the Geology Department of the University of Tanzania and Sheffield University in the United Kingdom which is of particular interest. There is potential for further work, particularly in relation to glaciology and world climate. The College of African Wildlife Management at Mweka and its facilities, is relatively close.


Although protection is total within the Park, and access is restricted, management is still not entirely adequate. A management plan, prepared in 1993, outlines the following objectives: to protect and maintain the Park's natural resources; to increase interpretation and visitor information; to encourage visitor use and development in a sustainable fashion; to improve park operations; and to strengthen the Park's relationship with local communities. A number of boundary adjustments and land protection strategies are described. Four of these strategies are: to include forest reserve lands within the National Park except for pine and cypress plantations and the half-mile strip below the forest, which is to be returned to village government control under sustained yield practices to provide useful local resources; to initiate an Integrated Regional Conservation Plan to lessen the local community's dependence on the mountain’s forest resources; to gazette the portion of Lake Chala within Tanzania into the National Park; and reaffirm and encourage full implementation of Mounduli District Council bylaws to provide complete protection for the North Kilimanjaro Migration Corridor.

A zoning scheme defining limits of acceptable use, has been implemented for the National Park and Forest Reserve areas. Seven zones have been identified: intensive use hiking zone (2,700 ha), low use hiking zone (summit-bound) (7,723 ha) and low use hiking zone (non-summit bound) (3,750 ha), day use zone (598 ha), wilderness zone (150,657 ha), mountaineering zone (2,510 ha), cultural protection zone (259 ha), and administration zone (62 ha) (Tanzania National Parks, 1993). Two projects initiated by the GEF-funded Community Management of Protected Areas Conservation Project (COMPACT) during 2002-4 were completed: to strengthen the capacity of the Mt Kilimanjaro Tour Guides Association and to train local NGOs in project management.


As in many other parks and reserves in Africa, resources are stretched, and manpower and equipment are not sufficient for full implementation of the management plan. Within the forest reserve exploitive activity has continued, although this was curtailed by Presidential Decree in 1984 and the issuing of timber licences has been stopped. Most difficulties are encountered in the management and protection of the montane forest, from illegal hunting, honey gathering, felling, fuel wood collection, grass burning and incursions by domestic livestock, particularly in the south-west. Both honey gathering and grass burning result in outbreaks of uncontrolled fires every year, particularly during the dry season and in the south-west and related to areas visited by tourists. It occurs even on the moorland edge and quite extensively within the Erica heathland. As with moorland in many parts of the world, fire is almost certainly one of the factors that has influenced the mountain biota for hundreds of years, and management (or non-management) of fire is likely to continue presenting problems. Tomlinson (1986) expressed concern that the frequency of fire on the Shira Plateau was increasing, and that this might pose a threat to the populations of giant groundsel. The gradual drying up of mountain rivers is also threatening the forest and farmland dependent on them (Lamprecht et al., 2002).

There is still a major problem of illegal deforestation, especially of camphorwood trees below 2,500m. This has led to widespread landslides: 88 were recorded by Lamprechts et al. (2002). The forest buffer zone is being maintained in six corridors within the park, but elsewhere felling has continued, and there has been some replacement with commercial plantations or maize crops, although this was halted temporarily by the 1984 Presidential Decree (Tanzania National Parks, 1993). Downslope, the mountain’s forests are diminishing in extent and quality due to land conversion, illegal logging, and fires, despite being an invaluable natural asset for Tanzania and for the local people in particular. Large tracts of indigenous forest have been converted into forest plantations, which now cover around 13,000 hectares, some 12% of Kilimanjaro Forest Reserve. On the western slopes, these plantations extend nearly to the moorland boundary, dividing the natural forest belt. However, only some 44% of the area allocated to forest plantations is actually planted with trees, the remaining area being open fields, often cultivated with annual crops. People have moved into these open areas, creating dense settlements within the Forest Reserve, some of which have expanded to the size of a town (Lambrechts, n.d.).

Problems have also resulted from the increasingly heavy use of the area by tourists. The amount of illegal use of the mountain’s resources however, reflects the stress caused by the very small percentage of hunting and viewing fees which reaches surrounding villagers. Animals often destroy crops and endanger daily chores in the countryside, but the government pays no compensation. Their wildlife is therefore more of a burden to the people than a benefit. Conservation is not coordinated between government sectors, and rural communities are not entrained to help protect animals in community wildlife management schemes (Singleton, 2004).


There is a total of 156 staff, headed by the Chief Park Warden, one Senior Park Warden and two Park Wardens (National Park Service, pers. comm., 1995).


Kilimanjaro was reported in 1984, to be the only park in Tanzania which approached self-sufficiency, paying for much of its administrative and management costs from the revenue accruing from tourism and this is still the case. The Park no longer receives subsidiaries from the government, although assistance is provided by other local and foreign organisations (National Park Service, pers. comm., 1995). Grants totalling US\$68,160 from the GEF Small Grants Program and UNF in 2003 funded community based conservation initiatives, via the Critical Ecosystem Partnership Fund.


The Director-General, Tanzania National Parks Authority, PO Box 3134, Arusha, Tanzania.

Chief Park Warden, PO Box 96, Marangu. Tanzania National Parks, PO Box 3134, Arusha, Tanzania.


The principal source for the above information was the original nomination for World Heritage status.

Allan, I. (ed). (1991). Guide to Mt. Kenya and Kilimanjaro. The Mountain Club of Kenya, Nairobi, Kenya.

Byarugaba, K. (1988). Report on the Threat Posed by Settlements and Human Activities on Arusha, Lake Manyara, Tarangire and Kilimanjaro National Parks. National Land Use Planning Commission, Dar es Salaam. 21 pp.

Child, G. (1965). Some notes on mammals of Mt.Kilimanjaro.Tanganyika Notes & Records 64: 77-89.

Coutts, H. (1969). Rainfall of the Kilimanjaro area. Weather 24: 66-69.

Gilbert, V. (1970). Plants of Kilimanjaro. Typed report. Office of Environmental Interpretation, U.S. National Park Service, Washington D.C.

Greenway, P. (1965). The vegetation and flora of Mt. Kilimanjaro. Tanganyika Notes and Records 64.

Grimshaw,J., Cordeiro, N. & Foley C. (1995). The mammals of Kilimanjaro. Journal of East African Natural History 84: 105-139.

Hutchinson, J. (1965). Kilimanjaro. Tanzania Notes and Records 64. Special issue.

Jäschke, E. (1980). Gutmann, Bruno, 1876 to 1966, Lutheran. Tanganyika (Tanzania). Building on clan, neighborhood, and age groups. From Occasional Bulletin of Missionary Research. Vol.4 (4): 165-169. In Anderson, G., Coote, R. Horner, N. & Phillips J. (eds) (1994). *Mission Legacies: Biographical Studies of Leaders of the Modern Missionary Movement.

Lambrechts, C., Woodley, B.,Hemp, A. Hemp, C.,Nyiti, P (2002). Aerial Survey of the Threats to Mt. Kilimanjaro Forests. UNDP, Dar es Salaam, Tanzania.

Lambrechts, C. (n.d.). Environmental Change at Mt. Kilimanjaro: Shrinking Glaciers & Diminishing Forests. UNF/UNEP/KWS/University of Bayreuth/WCST.

Lamprey, H. (1965). Birds of the forest and alpine zones of Kilimanjaro. Tanganyika Notes and Records 64:69-76.

Morris, B. (1970). The zonal vegetation of Kilimanjaro. African Wildlife 24 pp.

Mwasaga, B. (1983). Vegetation/Environment Relationships, Kiraragua Catchment Area, Mt. Kilimanjaro, Tanzania. MSc Thesis, University of Dar es Salam.

National Park Service (1967). Kilimanjaro; Survey for Proposed Mount Kilimanjaro National Park, Tanzania, East Africa. Survey conducted by the U.S. National Park Service for the United Republic of Tanzania.

Newmark, W.(1991).The Conservation of Mount Kilimanjaro. IUCN,Gland/Cambridge

Salt, G. (1954). A contribution to the ecology of Upper Kilimanjaro. Journal of Ecology 42: 375-423.

Sampson, D. (1965). The geology, volcanology and glaciology of Kilimanjaro. Tanganyika Notes and Records 64: 118-124.

Singleton, E. (2004). Overcoming government obstacles - some Tanzanian communities manage wildlife. Property and Environment Research Center Reports. Bozeman, MO, USA.

Tanzania National Parks/African Wildlife Foundation (1987). Mount Kilimanjaro National Park Tanzania National Parks, Arusha.

Tanzania National Parks (1993). Kilimanjaro National Park General Management Plan. Tanzania National Parks, Arusha. 188 pp.

Thompson, L. et al. (2002). Kilimanjaro ice core records: evidence of Holocene climate change in tropical Africa. Science, 298, 589-593.

Tomlinson, R. (1985). Observations on the giant groundsels of upper Kilimanjaro. Biological Conservation 31: 303-316.

Wilcockson, W. (1956). Preliminary notes on the geology of Kilimanjaro. Geol. Mag. 93(3): 218-228.

Wilkinson, P. (1954). Preliminary note on the state of volcanicity of Kilimanjaro. Geol. Survey, Tanganyika.


June 1987. Updated 11-1995, 3-2003, 3- 2005, May 2011.