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Location Equatorial Guinea, Río Muni
Central coordinates 11o 8.00' East  1o 12.00' North
IBA criteria A1, A2, A3
Area 70,000 ha
Altitude 400 - 800m
Year of IBA assessment 2001





Site description The Nsork (or Nsoc) Highlands are situated in the south-eastern corner of Río Muni and support one of the largest and best-preserved remaining areas of primary rainforest. The park is approximately triangular in shape and is bounded to the west by the Abang river, and to the south by the track linking the towns of Alum and Nsork. The north-eastern border is defined by the watershed between the Ouro river system to the north and the Abang and the Ncama rivers (the last flows through the eastern half of the park), affluents of the Ogooué river system to the south in Gabon. The park sits on a granitic plateau at about 500 m, from which a number of tall inselbergs protrude. The human population within the park is small, but probably exceeds 5,000 in the surrounding villages.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Trachyphonus purpuratus resident  2000  present  A3  Not Recognised 
Speckled Tinkerbird Pogoniulus scolopaceus resident  2000  present  A3  Least Concern 
Yellow-throated Tinkerbird Pogoniulus subsulphureus resident  2000  present  A3  Least Concern 
Afep Pigeon Columba unicincta resident  2000  present  A3  Least Concern 
Gabon Coucal Centropus anselli resident  2000  present  A3  Least Concern 
Sabine's Spinetail Rhaphidura sabini resident  2000  present  A3  Least Concern 
African Dwarf-kingfisher Ispidina lecontei resident  2000  present  A3  Least Concern 
White-bellied Kingfisher Corythornis leucogaster resident  2000  present  A3  Least Concern 
Black Bee-eater Merops gularis resident  2000  present  A3  Least Concern 
Merops muelleri resident  2000  present  A3  Not Recognised 
Bycanistes fistulator resident  2000  present  A3  Not Recognised 
Tropicranus albocristatus resident  2000  present  A3  Not Recognised 
Tockus fasciatus resident  2000  present  A3  Not Recognised 
Dwarf Hornbill Lophoceros camurus resident  2000  present  A3  Least Concern 
Grey-cheeked Hornbill Bycanistes subcylindricus resident  2000  present  A3  Least Concern 
White-thighed Hornbill Bycanistes albotibialis resident  2000  present  A3  Least Concern 
Black-casqued Hornbill Ceratogymna atrata resident  2000  present  A3  Least Concern 
Spotted Honeyguide Indicator maculatus resident  2000  present  A3  Least Concern 
Willcocks's Honeyguide Indicator willcocksi resident  2000  present  A3  Least Concern 
Buff-spotted Woodpecker Campethera nivosa resident  2000  present  A3  Least Concern 
Brown-eared Woodpecker Campethera caroli resident  2000  present  A3  Least Concern 
Rufous-sided Broadbill Smithornis rufolateralis resident  2000  present  A3  Least Concern 
Blue Cuckooshrike Coracina azurea resident  2000  present  A3  Least Concern 
Black-winged Oriole Oriolus nigripennis resident  2000  present  A3  Least Concern 
Shining Drongo Dicrurus atripennis resident  2000  present  A3  Least Concern 
Black-headed Paradise-flycatcher Terpsiphone rufiventer resident  2000  present  A3  Least Concern 
Blue-headed Crested-flycatcher Trochocercus nitens resident  2000  present  A3  Least Concern 
Dusky Crested-flycatcher Elminia nigromitrata resident  2000  present  A3  Least Concern 
Chestnut-capped Flycatcher Erythrocercus mccallii resident  2000  present  A3  Least Concern 
Grey-necked Picathartes Picathartes oreas resident  2000  present  A1, A2, A3  Vulnerable 
Apalis rufogularis resident  2000  present  A3  Not Recognised 
Yellow-browed Camaroptera Camaroptera superciliaris resident  2000  present  A3  Least Concern 
Olive-green Camaroptera Camaroptera chloronota resident  2000  present  A3  Least Concern 
Plain Greenbul Andropadus curvirostris resident  2000  present  A3  Least Concern 
Honeyguide Greenbul Baeopogon indicator resident  2000  present  A3  Least Concern 
Spotted Greenbul Ixonotus guttatus resident  2000  present  A3  Least Concern 
Simple Greenbul Chlorocichla simplex resident  2000  present  A3  Least Concern 
Swamp Greenbul Thescelocichla leucopleura resident  2000  present  A3  Least Concern 
Icterine Greenbul Phyllastrephus icterinus resident  2000  present  A3  Least Concern 
Xavier's Greenbul Phyllastrephus xavieri resident  2000  present  A3  Least Concern 
Common Bristlebill Bleda syndactylus resident  2000  present  A3  Least Concern 
Lesser Bristlebill Bleda notatus resident  2000  present  A3  Least Concern 
Green-backed Bulbul Criniger chloronotus resident  2000  present  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  2000  present  A3  Least Concern 
White-bearded Bulbul Criniger ndussumensis resident  2000  present  A3  Least Concern 
Yellow-spotted Nicator Nicator chloris resident  2000  present  A3  Least Concern 
Grey Longbill Macrosphenus concolor resident  2000  present  A3  Least Concern 
Violet-backed Hyliota Hyliota violacea resident  2000  present  A3  Least Concern 
Green Hylia Hylia prasina resident  2000  present  A3  Least Concern 
Green Crombec Sylvietta virens resident  2000  present  A3  Least Concern 
Blackcap Illadopsis Illadopsis cleaveri resident  2000  present  A3  Least Concern 
White-tailed Ant-thrush Neocossyphus poensis resident  2000  present  A3  Least Concern 
Rufous Flycatcher-thrush Stizorhina fraseri resident  2000  present  A3  Least Concern 
Forest Robin Stiphrornis erythrothorax resident  2000  present  A3  Least Concern 
Lowland Akalat Sheppardia cyornithopsis resident  2000  present  A3  Least Concern 
African Forest Flycatcher Fraseria ocreata resident  2000  present  A3  Least Concern 
White-browed Forest Flycatcher Fraseria cinerascens resident  2000  present  A3  Least Concern 
Olivaceous Flycatcher Muscicapa olivascens resident  2000  present  A3  Least Concern 
Cassin's Grey Flycatcher Muscicapa cassini resident  2000  present  A3  Least Concern 
Grey-throated Tit-flycatcher Myioparus griseigularis resident  2000  present  A3  Least Concern 
Scarlet-tufted Sunbird Anthreptes fraseri resident  2000  present  A3  Least Concern 
Black-throated Malimbe Malimbus cassini resident  2000  present  A3  Least Concern 
Rachel's Malimbe Malimbus racheliae resident  2000  present  A2, A3  Least Concern 
Crested Malimbe Malimbus malimbicus resident  2000  present  A3  Least Concern 
White-breasted Negrofinch Nigrita fusconotus resident  2000  present  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  2000  present  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Altos de Nsork National Park 70,000 is identical to site 70,000  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest   100%

Land use

Land-use Extent (% of site)
agriculture -
forestry -
nature conservation and research -

Other biodiversity The flora is, as yet, practically unsurveyed. Threatened mammals include four primate species of global conservation concern; Colobus satanas (VU), Mandrillus sphinx (LR/nt), Gorilla gorilla (EN) and Pan troglodytes (EN). The elephant Loxodonta africana (EN) also occurs.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Nsork Highlands National Park. Downloaded from http://www.birdlife.org on 01/10/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife