The park lies in Central Kenya, 140km north-west of Nairobi, in Nakuru district of the Rift Valley Province. The ecosystem comprises of the lake, surrounded by mainly wooded and bushy grasslands. The park supports a wide ecological diversity with Flamingos (Greater and Lesser) and other water birds being the major attractions of the area. The ecosystem provides for about 56 different species of mammals including the white rhino and buffaloes and a variety of terrestrial birds numbering nearly 450 species. The park was expanded over the years to 188 km2 to provide a perimeter buffer zone to protect the lake from encroachment by settlements and to minimise the impacts of urban and agricultural development in the immediate catchment. The park was declared a rhino sanctuary in 1983. The Rhino stocking programme which ensued received white rhinos from South Africa. Currently the sanctuary has approximately 45 black and 31 white rhinoceros. The lake is also designated as a RAMSAR site. Although it is a protected are, Lake Nakuru National park is threatened by human activities bath from within and outside the area. Siltation due to agricultural activities within the lake catchment is one of the major threats to the lake. Pollution from agricultural chemical such as fertilisers, pesticides, herbicides as well as industrial and domestic effluent from Nakuru town, which has a population of apploximately 212,000 inhabitants, enter the lake through surface inflows. The high number of tourists visiting the Lake and the development activities accompanying it are further threatening the lake's biological resources. From historical records, the lake, dried up between 1951 and 1953, and interventions to control soda dust were initiated in 1953. The lake water is highly saline but supports a habitat rich in biodiversity including a variety of aquatic flora and fauna. The lake also is inhabited by water mammals mainly hippopotamus and clawless otters while the terrestrial part of the park supports a large number of other African plain rnammals. The park is also a sanctuary of rhinoceros and the Rothschild's Giraffe (GiraJ5fa camelopardalis rothschildi). The introduction of a species of salt-tolerant Tilapiagrahami (for mosquito control) opened the way for the colonisation of the lake by many species of fish eating birds (Cormorants, pelicans, hamrnercop, etc). The park has a large reserve of over 300 species of birds, which make it an ideal site of bird lovers.