Sites - Important Bird Areas (IBAs)

Ornithological information See Box and Tables 2 and 3 for key species. The Ipassa reserve was, for a long time, the most intensely studied forest in Africa. This included about twenty years of ornithological research, during which period 424 species were recorded (not all of which, however, were found in the reserve itself). Three more species have subsequently been observed at Ipassa. Of the four species of global conservation concern known, three are rare migrants—Falco naumanni, Crex crex, and Gallinago media—and, in fact, only recorded from man-made habitats around the reserve. The fourth, Batis minima, is a rare breeding resident. Except for some species restricted to coastal forests or with specific ecological requirements (e.g. Picathartes oreas), the reserve holds almost all forest birds known from Gabon; only 11 species of the Guinea–Congo Forests biome on the Gabon list have not been found at Ipassa.

Site description Ipassa, also known as Mpassa, is situated in north-east Gabon, west of the town of Makokou. It consists mainly of moist lowland evergreen rainforest, located on a plateau at 450–550 m elevation and drained by small tributaries of the Ivindo river, which forms the southern boundary of the reserve. There are also some areas of mixed swamp-forests in valleys and near streams. Around the headquarters of the reserve’s biological research station, and between it and Makokou, 12 km distant, the vegetation has been much modified and includes extensive fallow and cultivated fields. Rocky islets appear in the Ivindo river during dry seasons.

Populations of IBA trigger species

Protected areas

Protected area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Ipassa Strict Nature Reserve	Faunal Reserve	10,000	is identical to site	10,000
Réserve naturelle intégrale d'Ipassa-Makokou	UNESCO-MAB Biosphere Reserve	15,000	protected area contains site	10,000

Habitats

Land use

Other biodiversity Large mammals Loxodonta africana (EN), Gorilla gorilla (EN) and Pan troglodytes (EN) have been recorded, but their present status is unknown.

Management considerations There was a permanent research station at Ipassa until 1985, when most staff left. This was followed by an increase in poaching to supply Makokou, the provincial capital. Initially, mammals were targeted, but large birds such as Ceratogymna atrata now seem to be rarer than a decade ago. Proposals for rehabilitating the research station have been made regularly, but have not so far been implemented.

References Brosset and Erard (1986), IRET-ECOTROP (CNRS) (1987).

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Recommended citation  BirdLife International (2013) Important Bird Areas factsheet: Ipassa Strict Nature Reserve. Downloaded from http://www.birdlife.org on 22/05/2013

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