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Location Cameroon, Central Province,Littoral Province
Central coordinates 10o 25.00' East  4o 30.00' North
IBA criteria A1, A2, A3
Area 300,000 ha
Altitude 9 - 1,304m
Year of IBA assessment 2001

Cameroon Biodiversity Conservation Society (Affiliate)



Site description The site is situated in the vast expense of forested country stretching from Yabassi (Nkam Department) to Ndikiniméki (Mbam Department). It consists mainly of three contiguous blocks of forest: Makombé (c.600 km²), Ndokbou (at least 1,000 km²) and Ebo (1,400 km²). Makombé Forest is immediately east of and contiguous with the forest of Mont Nlonako (CM023); their common boundary is formed by the Nkam river and the road from Yabassi to Nkondjock. The Makombé Forest is limited to the north, east and south by the Makombé river, a tributary of the Nkam. Ndokbou Forest stretches east from the middle Makombé river to Ndikiniméki, north to Tongo, and is contiguous to the south with Ebo Forest. The latter is traversed by the Ebo river in its centre, limited to the west by the Dibamba and to the east by the Iwouem river (a tributary of the Sanaga). These forests are fringed with a few hunting villages along their borders, but are otherwise uninhabited. The relief is steep, especially in Ndokbou and Ebo where many hills reach over 1,000 m (to 1,304 m). Away from river valleys where the forest can be impressively tall, the main forest-type is semi-evergreen with a low canopy: on steep gradients the soils are rather shallow, underlain with clay and rocks, thus the canopy reaches moderate heights (often around 20 m) and emergents are well spaced out. Common tall trees include Antrocaryon, Ceiba, Lophira, Piptadeniastrum, Pycnanthus, Scyphocephalum, Terminalia and Uapaca.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Guineafowl Agelastes niger resident  2000  present [units unknown]  A3  Least Concern 
Forest Francolin Francolinus lathami resident  2000  present [units unknown]  A3  Least Concern 
Hartlaub's Duck Pteronetta hartlaubii resident  2000  present [units unknown]  A3  Least Concern 
Spot-breasted Ibis Bostrychia rara resident  2000  present [units unknown]  A3  Least Concern 
Congo Serpent-eagle Dryotriorchis spectabilis resident  2000  present [units unknown]  A3  Least Concern 
Chestnut-flanked Sparrowhawk Accipiter castanilius resident  2000  present [units unknown]  A3  Least Concern 
Red-thighed Sparrowhawk Accipiter erythropus resident  2000  present [units unknown]  A3  Least Concern 
Long-tailed Hawk Urotriorchis macrourus resident  2000  present [units unknown]  A3  Least Concern 
Cassin's Hawk-eagle Aquila africanus resident  2000  present [units unknown]  A3  Least Concern 
White-spotted Flufftail Sarothrura pulchra resident  2000  present [units unknown]  A3  Least Concern 
Nkulengu Rail Himantornis haematopus resident  2000  present [units unknown]  A3  Least Concern 
Afep Pigeon Columba unicincta resident  2000  present [units unknown]  A3  Least Concern 
Western Bronze-naped Pigeon Columba iriditorques resident  2000  present [units unknown]  A3  Least Concern 
Blue-headed Wood-dove Turtur brehmeri resident  2000  present [units unknown]  A3  Least Concern 
Psittacus erithacus resident  2000  present [units unknown]  A3  Not Recognised 
Guinea Turaco Tauraco persa resident  2000  present [units unknown]  A3  Least Concern 
Yellow-billed Turaco Tauraco macrorhynchus resident  2000  present [units unknown]  A3  Least Concern 
Black-throated Coucal Centropus leucogaster resident  2000  present [units unknown]  A3  Least Concern 
Fraser's Eagle-owl Bubo poensis resident  2000  present [units unknown]  A3  Least Concern 
Akun Eagle-owl Bubo leucostictus resident  2000  present [units unknown]  A3  Least Concern 
Vermiculated Fishing-owl Scotopelia bouvieri resident  2000  present [units unknown]  A3  Least Concern 
Red-chested Owlet Glaucidium tephronotum resident  2000  present [units unknown]  A3  Least Concern 
Sjostedt's Owlet Glaucidium sjostedti resident  2000  present [units unknown]  A3  Least Concern 
Black Spinetail Telacanthura melanopygia resident  2000  present [units unknown]  A3  Least Concern 
Sabine's Spinetail Rhaphidura sabini resident  2000  present [units unknown]  A3  Least Concern 
Cassin's Spinetail Neafrapus cassini resident  2000  present [units unknown]  A3  Least Concern 
Bates's Swift Apus batesi resident  2000  present [units unknown]  A3  Least Concern 
Bare-cheeked Trogon Apaloderma aequatoriale resident  2000  present [units unknown]  A3  Least Concern 
Blue-throated Roller Eurystomus gularis resident  2000  present [units unknown]  A3  Least Concern 
Chocolate-backed Kingfisher Halcyon badia resident  2000  present [units unknown]  A3  Least Concern 
African Dwarf-kingfisher Ceyx lecontei resident  2000  present [units unknown]  A3  Least Concern 
White-bellied Kingfisher Alcedo leucogaster resident  2000  present [units unknown]  A3  Least Concern 
Black Bee-eater Merops gularis resident  2000  present [units unknown]  A3  Least Concern 
Merops muelleri resident  2000  present [units unknown]  A3  Not Recognised 
Black Dwarf Hornbill Tockus hartlaubi resident  2000  present [units unknown]  A3  Least Concern 
Red-billed Dwarf Hornbill Tockus camurus resident  2000  present [units unknown]  A3  Least Concern 
African Pied Hornbill Tockus fasciatus resident  2000  present [units unknown]  A3  Least Concern 
White-crested Hornbill Tropicranus albocristatus resident  2000  present [units unknown]  A3  Least Concern 
Piping Hornbill Bycanistes fistulator resident  2000  present [units unknown]  A3  Least Concern 
White-thighed Hornbill Bycanistes albotibialis resident  2000  present [units unknown]  A3  Least Concern 
Black-casqued Hornbill Ceratogymna atrata resident  2000  present [units unknown]  A3  Least Concern 
Yellow-casqued Hornbill Ceratogymna elata resident  2000  present [units unknown]  A1, A3  Vulnerable 
Naked-faced Barbet Gymnobucco calvus resident  2000  present [units unknown]  A3  Least Concern 
Bristle-nosed Barbet Gymnobucco peli resident  2000  present [units unknown]  A3  Least Concern 
Speckled Tinkerbird Pogoniulus scolopaceus resident  2000  present [units unknown]  A3  Least Concern 
Red-rumped Tinkerbird Pogoniulus atroflavus resident  2000  present [units unknown]  A3  Least Concern 
Yellow-throated Tinkerbird Pogoniulus subsulphureus resident  2000  present [units unknown]  A3  Least Concern 
Yellow-spotted Barbet Buccanodon duchaillui resident  2000  present [units unknown]  A3  Least Concern 
Hairy-breasted Barbet Tricholaema hirsuta resident  2000  present [units unknown]  A3  Least Concern 
Yellow-billed Barbet Trachyphonus purpuratus resident  2000  present [units unknown]  A3  Least Concern 
Spotted Honeyguide Indicator maculatus resident  2000  present [units unknown]  A3  Least Concern 
Lyre-tailed Honeyguide Melichneutes robustus resident  2000  present [units unknown]  A3  Least Concern 
African Piculet Sasia africana resident  2000  present [units unknown]  A3  Least Concern 
Buff-spotted Woodpecker Campethera nivosa resident  2000  present [units unknown]  A3  Least Concern 
Gabon Woodpecker Dendropicos gabonensis resident  2000  present [units unknown]  A3  Least Concern 
Golden-crowned Woodpecker Thripias xantholophus resident  2000  present [units unknown]  A3  Least Concern 
Rufous-sided Broadbill Smithornis rufolateralis resident  2000  present [units unknown]  A3  Least Concern 
West African Batis Batis occulta resident  2000  present [units unknown]  A3  Least Concern 
Chestnut Wattle-eye Platysteira castanea resident  2000  present [units unknown]  A3  Least Concern 
White-spotted Wattle-eye Platysteira tonsa resident  2000  present [units unknown]  A3  Least Concern 
Chestnut-bellied Helmet-shrike Prionops caniceps resident  2000  present [units unknown]  A3  Least Concern 
Fiery-breasted Bush-shrike Malaconotus cruentus resident  2000  present [units unknown]  A3  Least Concern 
Red-eyed Puffback Dryoscopus senegalensis resident  2000  present [units unknown]  A3  Least Concern 
Large-billed Puffback Dryoscopus sabini resident  2000  present [units unknown]  A3  Least Concern 
Sooty Boubou Laniarius leucorhynchus resident  2000  present [units unknown]  A3  Least Concern 
Blue Cuckooshrike Coracina azurea resident  2000  present [units unknown]  A3  Least Concern 
Western Black-headed Oriole Oriolus brachyrhynchus resident  2000  present [units unknown]  A3  Least Concern 
Shining Drongo Dicrurus atripennis resident  2000  present [units unknown]  A3  Least Concern 
Black-headed Paradise-flycatcher Terpsiphone rufiventer resident  2000  present [units unknown]  A3  Least Concern 
Blue-headed Crested-flycatcher Trochocercus nitens resident  2000  present [units unknown]  A3  Least Concern 
Rufous-vented Paradise-flycatcher Terpsiphone rufocinerea resident  2000  present [units unknown]  A3  Least Concern 
Dusky Crested-flycatcher Elminia nigromitrata resident  2000  present [units unknown]  A3  Least Concern 
Chestnut-capped Flycatcher Erythrocercus mccallii resident  2000  present [units unknown]  A3  Least Concern 
Grey-necked Picathartes Picathartes oreas resident  2000  present [units unknown]  A1, A2, A3  Vulnerable 
Tit-hylia Pholidornis rushiae resident  2000  present [units unknown]  A3  Least Concern 
Square-tailed Saw-wing Psalidoprocne nitens resident  2000  present [units unknown]  A3  Least Concern 
White-throated Blue Swallow Hirundo nigrita resident  2000  present [units unknown]  A3  Least Concern 
Forest Swallow Hirundo fuliginosa resident  2000  present [units unknown]  A2, A3  Least Concern 
Chattering Cisticola Cisticola anonymus resident  2000  present [units unknown]  A3  Least Concern 
Black-capped Apalis Apalis nigriceps resident  2000  present [units unknown]  A3  Least Concern 
Apalis rufogularis resident  2000  present [units unknown]  A3  Not Recognised 
Yellow-browed Camaroptera Camaroptera superciliaris resident  2000  present [units unknown]  A3  Least Concern 
Olive-green Camaroptera Camaroptera chloronota resident  2000  present [units unknown]  A3  Least Concern 
Grey Greenbul Andropadus gracilis resident  2000  present [units unknown]  A3  Least Concern 
Ansorge's Greenbul Andropadus ansorgei resident  2000  present [units unknown]  A3  Least Concern 
Plain Greenbul Andropadus curvirostris resident  2000  present [units unknown]  A3  Least Concern 
Golden Greenbul Calyptocichla serina resident  2000  present [units unknown]  A3  Least Concern 
Honeyguide Greenbul Baeopogon indicator resident  2000  present [units unknown]  A3  Least Concern 
White-tailed Greenbul Baeopogon clamans resident  2000  present [units unknown]  A3  Least Concern 
Spotted Greenbul Ixonotus guttatus resident  2000  present [units unknown]  A3  Least Concern 
Simple Greenbul Chlorocichla simplex resident  2000  present [units unknown]  A3  Least Concern 
Swamp Greenbul Thescelocichla leucopleura resident  2000  present [units unknown]  A3  Least Concern 
Icterine Greenbul Phyllastrephus icterinus resident  2000  present [units unknown]  A3  Least Concern 
Xavier's Greenbul Phyllastrephus xavieri resident  2000  present [units unknown]  A3  Least Concern 
Common Bristlebill Bleda syndactylus resident  2000  present [units unknown]  A3  Least Concern 
Lesser Bristlebill Bleda notatus resident  2000  present [units unknown]  A3  Least Concern 
Green-backed Bulbul Criniger chloronotus resident  2000  present [units unknown]  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  2000  present [units unknown]  A3  Least Concern 
White-bearded Bulbul Criniger ndussumensis resident  2000  present [units unknown]  A3  Least Concern 
Yellow-spotted Nicator Nicator chloris resident  2000  present [units unknown]  A3  Least Concern 
Yellow-throated Nicator Nicator vireo resident  2000  present [units unknown]  A3  Least Concern 
Yellow Longbill Macrosphenus flavicans resident  2000  present [units unknown]  A3  Least Concern 
Grey Longbill Macrosphenus concolor resident  2000  present [units unknown]  A3  Least Concern 
Green Hylia Hylia prasina resident  2000  present [units unknown]  A3  Least Concern 
Rufous-crowned Eremomela Eremomela badiceps resident  2000  present [units unknown]  A3  Least Concern 
Green Crombec Sylvietta virens resident  2000  present [units unknown]  A3  Least Concern 
Lemon-bellied Crombec Sylvietta denti resident  2000  present [units unknown]  A3  Least Concern 
Blackcap Illadopsis Illadopsis cleaveri resident  2000  present [units unknown]  A3  Least Concern 
Brown Illadopsis Illadopsis fulvescens resident  2000  present [units unknown]  A3  Least Concern 
Grey-chested Babbler Kakamega poliothorax resident  2000    Least Concern 
Purple-headed Glossy-starling Lamprotornis purpureiceps resident  2000  present [units unknown]  A3  Least Concern 
Narrow-tailed Starling Poeoptera lugubris resident  2000  present [units unknown]  A3  Least Concern 
White-tailed Ant-thrush Neocossyphus poensis resident  2000  present [units unknown]  A3  Least Concern 
Rufous Flycatcher-thrush Stizorhina fraseri resident  2000  present [units unknown]  A3  Least Concern 
Alethe diademata resident  2000  present [units unknown]  A3  Not Recognised 
Forest Robin Stiphrornis erythrothorax resident  2000  present [units unknown]  A3  Least Concern 
Lowland Akalat Sheppardia cyornithopsis resident  2000  present [units unknown]  A3  Least Concern 
Blue-shouldered Robin-chat Cossypha cyanocampter resident  2000  present [units unknown]  A3  Least Concern 
African Forest Flycatcher Fraseria ocreata resident  2000  present [units unknown]  A3  Least Concern 
White-browed Forest Flycatcher Fraseria cinerascens resident  2000  present [units unknown]  A3  Least Concern 
Sooty Flycatcher Muscicapa infuscata resident  2000  present [units unknown]  A3  Least Concern 
Olivaceous Flycatcher Muscicapa olivascens resident  2000  present [units unknown]  A3  Least Concern 
Little Grey Flycatcher Muscicapa epulata resident  2000  present [units unknown]  A3  Least Concern 
Yellow-footed Flycatcher Muscicapa sethsmithi resident  2000  present [units unknown]  A3  Least Concern 
Cassin's Grey Flycatcher Muscicapa cassini resident  2000  present [units unknown]  A3  Least Concern 
Scarlet-tufted Sunbird Anthreptes fraseri resident  2000  present [units unknown]  A3  Least Concern 
Green Sunbird Anthreptes rectirostris resident  2000  present [units unknown]  A3  Least Concern 
Little Green Sunbird Nectarinia seimundi resident  2000  present [units unknown]  A3  Least Concern 
Bates's Sunbird Nectarinia batesi resident  2000  present [units unknown]  A3  Least Concern 
Reichenbach's Sunbird Nectarinia reichenbachii resident  2000  present [units unknown]  A3  Least Concern 
Cameroon Sunbird Nectarinia oritis resident  2000    Least Concern 
Blue-throated Brown Sunbird Nectarinia cyanolaema resident  2000  present [units unknown]  A3  Least Concern 
Green-throated Sunbird Nectarinia rubescens resident  2000  present [units unknown]  A3  Least Concern 
Tiny Sunbird Nectarinia minulla resident  2000  present [units unknown]  A3  Least Concern 
Splendid Sunbird Nectarinia coccinigaster resident  2000    Least Concern 
Johanna's Sunbird Nectarinia johannae resident  2000  present [units unknown]  A3  Least Concern 
Superb Sunbird Nectarinia superba resident  2000  present [units unknown]  A3  Least Concern 
Vieillot's Black Weaver Ploceus nigerrimus resident  2000  present [units unknown]  A3  Least Concern 
Maxwell's Black Weaver Ploceus albinucha resident  2000  present [units unknown]  A3  Least Concern 
Rachel's Malimbe Malimbus racheliae resident  2000  present [units unknown]  A2, A3  Least Concern 
Red-vented Malimbe Malimbus scutatus resident  2000  present [units unknown]  A3  Least Concern 
Red-bellied Malimbe Malimbus erythrogaster resident  2000  present [units unknown]  A3  Least Concern 
Gray's Malimbe Malimbus nitens resident  2000  present [units unknown]  A3  Least Concern 
Crested Malimbe Malimbus malimbicus resident  2000  present [units unknown]  A3  Least Concern 
Red-headed Malimbe Malimbus rubricollis resident  2000  present [units unknown]  A3  Least Concern 
Woodhouse's Antpecker Parmoptila woodhousei resident  2000  present [units unknown]  A3  Least Concern 
White-breasted Negrofinch Nigrita fusconotus resident  2000  present [units unknown]  A3  Least Concern 
Chestnut-breasted Negrofinch Nigrita bicolor resident  2000  present [units unknown]  A3  Least Concern 
Pale-fronted Negrofinch Nigrita luteifrons resident  2000  present [units unknown]  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  2000  present [units unknown]  A3  Least Concern 

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Lowland forest - mixed moist evgn & semi-evgn; Mid-altitude forest - transitional; Montane forest - mixed; Woodland - transition  -
Wetlands (inland) Mangroves  -

Land use

Land-use Extent (% of site)
agriculture -
forestry -

Other biodiversity Makombé Forest has been over-hunted, but the Ndokbou and Ebo Forests are still extremely important for their large populations of Loxodonta africana (EN) and several primates. These include Pan troglodytes (EN), Cercopithecus preussi (EN), Mandrillus leucophaeus (EN) still found in large groups throughout (this site probably harbours the most important population of drill in Cameroon today), a ‘new’ population of Procolobus (badius) preussi (EN) and, also most unexpectedly, a small population of Gorilla gorilla (EN) confined to the north-east hills of Ebo Forest and perhaps also in south Ndokbou. The frog Conraua goliath (VU) is much hunted for food, but is still widespread.

Related state of the world's birds case studies

References Dowsett-Lemaire and Dowsett (2001a).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Yabassi. Downloaded from http://www.birdlife.org on 18/04/2014

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