Nairobi National Park is a major stop-off for birds migrating to (and within) Africa, so you are promised to see a huge array of bird species which makes the park a top choice for a day birding tour in Kenya. The park is an area of natural landscape at the grassland-forest boundary, only 7 kilometer from the centre of Kenya's capital city, Nairobi. It covers an area of 11,700 hactares with an Area Altitude of 1,540 - 1,780 meters. Nairobi National Park is one of the major bird watching destinations in Kenya due to its close vicinity to the capital city and high number of bird species documented plus its relatively small size.

The park is fenced along three sides, where it is adjacent to urban housing, industry, roads and airports; only the southern border, along the Embakasi and Athi rivers, is open for animal dispersal. The park's varied habitats include open, rolling grass plains, riverine woodland, valley thicket and bush, artificial dams and ponds, rocky gorges and upland dry forest. Ecologically, the park is intimately linked to the Kitengela and AthiKapiti plains, which adjoin it to the south, forming a single ecological unit. Being close to the city centre and supporting a variety of large mammals, this park is a popular destination.

Nairobi National Park is an important roosting site for Falco naumanni flocks on passage (up to 5,000 have been recorded), although numbers have declined markedly in recent years. The substantial area of undisturbed grassland is of great importance for species such as the restricted-range Euplectes jacksoni, which breeds here regularly after good rains. The avifauna is diverse, with a remarkable 516 species recorded, including 27 of Kenya's 94 Somali - Masai biome species (23 of which are regular), and 25 of Kenya's 67 African Highland biome species. The globally threatened Crex crex is a scarce visitor from the Palearctic, and the Near Threatened Balaeniceps rex and Acrocephalus griseldis have both been recorded once. Ardeola idae is a regular non-breeding visitor (May - October) in small numbers, and Parus fringillinus is fairly common in riverine Acacia woodland.

Regionally threatened species include Struthio camelus (common), Anhinga rufa (scarce visitor), Casmerodius albus (regular visitor to dams and ponds), Ephippiorhynchus senegalensis (resident in small numbers), Hieraaetus ayresii (scarce resident in the forest), Stephanoaetus coronatus (at least one pair nests in the forest), Polemaetus bellicosus (several pairs have home ranges that include the park), Podica senegalensis (resident in small numbers on thickly-fringed sections of the rivers), and Buphagus africanus (moderately common).

Other birds include;

Maasai Ostrich, African Darter, African Finfoot, Dwarf Bittern, Goliath Heron, Saddle-billed Stork, Spur-winged Goose, African Crowned Eagle, Secretarybird, African Fish Eagle, Ruppell's Griffon Vulture, Black -chested Snake-Eagle, Gabar Goshawk, Augur Buzzard, Tawny Eagle, Bateleur, Shelly's Francolin, Grey crowned Crane, Kori Bustard, White-bellied Bustard, Hartlaub's Bustard, Bronze- winged Courser African Skimmer.