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Location Nigeria, Cross River
Central coordinates 9o 14.00' East  6o 17.00' North
IBA criteria A1, A2, A3
Area 92,000 ha
Altitude 150 - 1,700m
Year of IBA assessment 2001

Nigerian Conservation Foundation



Site description The Okwangwo Division is the northern part of the Cross River National Park (CRNP), separated by about 50 km of disturbed rainforest from the southern Oban Division (NG007). It is located south-west of the Obudu Plateau (NG001) in south-eastern Nigeria and lies immediately east of Afi River Forest Reserve (NG005). It is bordered to the east by Takamanda Forest Reserve in Cameroon. The terrain comprises numerous ridge systems and rocky outcrops. Elevations reach 1,700 m in the Sankwala mountains in the north and about 1,000 m in the Mbe mountains in the south-west. The site is drained by the Oyi, Bemi and Okon rivers, all tributaries of the Cross river. Vegetation consists of two general types; lowland rainforest at lower elevations and montane grasslands (with relict forests in valleys) along high ridge-tops. Areas of derived savanna occur in lowland parts where there has been intense forest degradation. Soils of the lowland areas are ferralitic and highly susceptible to leaching, while those of the grassland areas are ferruginous and very easily eroded when exposed. The area has marked wet (March–November) and dry (December–February) seasons. Up to 4,280 mm of rain falls annually.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Forest Francolin Peliperdix lathami resident  1999  present  A3  Least Concern 
White-crested Tiger-heron Tigriornis leucolopha resident  1999  present  A3  Least Concern 
Congo Serpent-eagle Dryotriorchis spectabilis resident  1999  present  A3  Least Concern 
Chestnut-flanked Sparrowhawk Accipiter castanilius resident  1999  unknown  A3  Least Concern 
Long-tailed Hawk Urotriorchis macrourus resident  1999  present  A3  Least Concern 
White-spotted Flufftail Sarothrura pulchra resident  1999  present  A3  Least Concern 
Afep Pigeon Columba unicincta resident  1999  unknown  A3  Least Concern 
Psittacus erithacus resident  1999  present  A3  Not Recognised 
Green Turaco Tauraco persa resident  1999  present  A3  Least Concern 
Yellow-billed Turaco Tauraco macrorhynchus resident  1999  unknown  A3  Least Concern 
Dusky Long-tailed Cuckoo Cercococcyx mechowi resident  1999  present  A3  Least Concern 
Sabine's Spinetail Rhaphidura sabini resident  1999  present  A3  Least Concern 
Cassin's Spinetail Neafrapus cassini resident  1999  present  A3  Least Concern 
Bates's Swift Apus batesi resident  1999  unknown  A3  Least Concern 
White-bellied Kingfisher Corythornis leucogaster resident  1999  present  A3  Least Concern 
Black Bee-eater Merops gularis resident  1999  present  A3  Least Concern 
Merops muelleri resident  1999  present  A3  Not Recognised 
Bycanistes fistulator resident  1999  present  A3  Not Recognised 
Tropicranus albocristatus resident  1999  present  A3  Not Recognised 
Tockus fasciatus resident  1999  present  A3  Not Recognised 
Tockus hartlaubi resident  1999  present  A3  Not Recognised 
Dwarf Hornbill Lophoceros camurus resident  1999  present  A3  Least Concern 
White-thighed Hornbill Bycanistes albotibialis resident  1999  unknown  A3  Least Concern 
Gymnobucco calvus resident  1999  present  A3  Not Recognised 
Trachyphonus purpuratus resident  1999  unknown  A3  Not Recognised 
Bristle-nosed Barbet Gymnobucco peli resident  1999  present  A3  Least Concern 
Speckled Tinkerbird Pogoniulus scolopaceus resident  1999  present  A3  Least Concern 
Red-rumped Tinkerbird Pogoniulus atroflavus resident  1999  unknown  A3  Least Concern 
Yellow-spotted Barbet Buccanodon duchaillui resident  1999  present  A3  Least Concern 
Hairy-breasted Barbet Tricholaema hirsuta resident  1999  unknown  A3  Least Concern 
Spotted Honeyguide Indicator maculatus resident  1999  present  A3  Least Concern 
Dendropicos gabonensis resident  1999  unknown  A3  Not Recognised 
Buff-spotted Woodpecker Campethera nivosa resident  1999  present  A3  Least Concern 
Fire-bellied Woodpecker Dendropicos pyrrhogaster resident  1999  present  A3  Least Concern 
Rufous-sided Broadbill Smithornis rufolateralis resident  1999  present  A3  Least Concern 
Chestnut Wattle-eye Platysteira castanea resident  1999  present  A3  Least Concern 
Red-cheeked Wattle-eye Platysteira blissetti resident  1999  present  A3  Least Concern 
Sooty Boubou Laniarius leucorhynchus resident  1999  present  A3  Least Concern 
Blue Cuckooshrike Coracina azurea resident  1999  present  A3  Least Concern 
Western Black-headed Oriole Oriolus brachyrhynchus resident  1999  unknown  A3  Least Concern 
Shining Drongo Dicrurus atripennis resident  1999  unknown  A3  Least Concern 
Black-headed Paradise-flycatcher Terpsiphone rufiventer resident  1999  present  A3  Least Concern 
Blue-headed Crested-flycatcher Trochocercus nitens resident  1999  present  A3  Least Concern 
Dusky Crested-flycatcher Elminia nigromitrata resident  1999  present  A3  Least Concern 
Chestnut-capped Flycatcher Erythrocercus mccallii resident  1999  unknown  A3  Least Concern 
Grey-necked Picathartes Picathartes oreas resident  1999  present  A1, A2, A3  Vulnerable 
Square-tailed Saw-wing Psalidoprocne nitens resident  1999  present  A3  Least Concern 
Black-capped Apalis Apalis nigriceps resident  1999  present  A3  Least Concern 
Apalis rufogularis resident  1999  present  A3  Not Recognised 
Yellow-browed Camaroptera Camaroptera superciliaris resident  1999  present  A3  Least Concern 
Olive-green Camaroptera Camaroptera chloronota resident  1999  present  A3  Least Concern 
Grey Greenbul Andropadus gracilis resident  1999  present  A3  Least Concern 
Ansorge's Greenbul Andropadus ansorgei resident  1999  unknown  A3  Least Concern 
Plain Greenbul Andropadus curvirostris resident  1999  unknown  A3  Least Concern 
Golden Greenbul Calyptocichla serina resident  1999  present  A3  Least Concern 
Honeyguide Greenbul Baeopogon indicator resident  1999  present  A3  Least Concern 
Spotted Greenbul Ixonotus guttatus resident  1999  unknown  A3  Least Concern 
Swamp Greenbul Thescelocichla leucopleura resident  1999  present  A3  Least Concern 
Icterine Greenbul Phyllastrephus icterinus resident  1999  present  A3  Least Concern 
Common Bristlebill Bleda syndactylus resident  1999  present  A3  Least Concern 
Lesser Bristlebill Bleda notatus resident  1999  present  A3  Least Concern 
Grey-headed Bristlebill Bleda canicapillus resident  1999  present  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  1999  present  A3  Least Concern 
Kemp's Longbill Macrosphenus kempi resident  1999  present  A3  Least Concern 
Yellow Longbill Macrosphenus flavicans resident  1999  present  A3  Least Concern 
Grey Longbill Macrosphenus concolor resident  1999  present  A3  Least Concern 
Violet-backed Hyliota Hyliota violacea resident  1999  unknown  A3  Least Concern 
Green Hylia Hylia prasina resident  1999  present  A3  Least Concern 
Green Crombec Sylvietta virens resident  1999  present  A3  Least Concern 
Brown Illadopsis Illadopsis fulvescens resident  1999  present  A3  Least Concern 
Narrow-tailed Starling Poeoptera lugubris resident  1999  present  A3  Least Concern 
Alethe diademata resident  1999  present  A3  Not Recognised 
Forest Robin Stiphrornis erythrothorax resident  1999  unknown  A3  Least Concern 
White-browed Forest Flycatcher Fraseria cinerascens resident  1999  present  A3  Least Concern 
Sooty Flycatcher Muscicapa infuscata resident  1999  present  A3  Least Concern 
Yellow-footed Flycatcher Muscicapa sethsmithi resident  1999  present  A3  Least Concern 
Cassin's Grey Flycatcher Muscicapa cassini resident  1999  present  A3  Least Concern 
Blue-throated Brown Sunbird Nectarinia cyanolaema resident  1999  present  A3  Least Concern 
Buff-throated Sunbird Nectarinia adelberti resident  1999  present  A3  Least Concern 
Vieillot's Black Weaver Ploceus nigerrimus resident  1999  present  A3  Least Concern 
Yellow-mantled Weaver Ploceus tricolor resident  1999  present  A3  Least Concern 
Red-vented Malimbe Malimbus scutatus resident  1999  present  A3  Least Concern 
Gray's Malimbe Malimbus nitens resident  1999  present  A3  Least Concern 
Crested Malimbe Malimbus malimbicus resident  1999  present  A3  Least Concern 
White-breasted Negrofinch Nigrita fusconotus resident  1999  present  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  1999  unknown  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Cross River National Park 800,000 protected area contains site 92,000  
Cross River North Forest Reserve 16,774 protected area contained by site 16,774  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Artificial - terrestrial   2%
Unknown   4%
Forest   92%

Land use

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

Other biodiversity With 18 species, Okwangwo has the highest diversity of primates recorded at a single site in Africa. Species include Pan troglodytes (VU), Gorilla gorilla (VU), Cercopithecus sclateri (EN), Cercopithecus preussi (EN) and Mandrillus leucophaeus (EN). Other large mammals include Loxodonta africana cyclotis (EN) and Syncerus caffer (LR/cd). Two species of Lepidoptera (Tetrarhanis okwango and T. ogojea) new to science have recently been described from the area. Plant diversity is high. A recent plant survey resulted in six first records for the country and four species possibly new to science.

References Ash (1991), Hall (1981), Oates et al. (1992), Obot (1996), Obot et al. (1996), Schmitt (1996), WWF (1990b).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Cross River National Park: Okwangwo Division. Downloaded from http://www.birdlife.org on 24/07/2014

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