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Location Nigeria, Taraba
Central coordinates 10o 34.00' East  7o 17.00' North
IBA criteria A3
Area 100,000 ha
Altitude 200 - 1,200m
Year of IBA assessment 2001

Nigerian Conservation Foundation



Site description The Donga river basin forests are located on the slopes and at the foot of the Mambilla Plateau, south-west of Gashaka-Gumti National Park (NG002). They include Baissa, Amboi and Bissaula River Forest Reserves as well as some areas of unprotected forests near the villages of Akwabe and Akoforo. The area is lowland forest beside the Donga river, south of Buru village and about 10 km from the border with Cameroon. The terrain is hilly and rocky. Derived savanna occurs in disturbed parts, but more forest survives in the east and south of the site. Dominant tree species include Brachystegia sp., Khaya grandifoliola, Erythrophleum guineensis, Tetrapleura tetraptera, Pterygota macrocarpa, Cleistopholis patens and Garcinia kola. Amongst the many species of lianas present are Entada pursaetha, Laccosperma opacum and Piper guineense. Rainfall is heavy and persistent due to the influence of the neighbouring Mambilla Plateau and the Cameroon mountains, but no figures are available. Soils are well drained, brown sandy loams, containing limited organic material.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Gymnobucco calvus resident  1999  present  A3  Not Recognised 
Trachyphonus purpuratus resident  1999  present  A3  Not Recognised 
Yellow-spotted Barbet Buccanodon duchaillui resident  1999  present  A3  Least Concern 
Forest Francolin Peliperdix lathami resident  1999  present  A3  Least Concern 
Hartlaub's Duck Pteronetta hartlaubii resident  1999  present  A3  Least Concern 
Cassin's Hawk-eagle Aquila africana resident  1999  present  A3  Least Concern 
Blue-headed Wood-dove Turtur brehmeri resident  1999  present  A3  Least Concern 
Green Turaco Tauraco persa resident  1999  present  A3  Least Concern 
Dusky Long-tailed Cuckoo Cercococcyx mechowi resident  1999  present  A3  Least Concern 
Blue-throated Roller Eurystomus gularis resident  1999  present  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 
Bycanistes fistulator resident  1999  present  A3  Not Recognised 
Tockus fasciatus resident  1999  present  A3  Not Recognised 
Spotted Honeyguide Indicator maculatus resident  1999  present  A3  Least Concern 
Grey-headed Broadbill Smithornis sharpei resident  1999  present  A3  Least Concern 
African Shrike-flycatcher Megabyas flammulatus resident  1999  present  A3  Least Concern 
Chestnut Wattle-eye Platysteira castanea resident  1999  present  A3  Least Concern 
Western Black-headed Oriole Oriolus brachyrhynchus resident  1999  present  A3  Least Concern 
Black-headed Paradise-flycatcher Terpsiphone rufiventer resident  1999  present  A3  Least Concern 
Fanti Saw-wing Psalidoprocne obscura 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 
Spotted Greenbul Ixonotus guttatus resident  1999  unknown  A3  Least Concern 
Simple Greenbul Chlorocichla simplex resident  1999  present  A3  Least Concern 
Common Bristlebill Bleda syndactylus resident  1999  present  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  1999  present  A3  Least Concern 
Yellow-spotted Nicator Nicator chloris resident  1999  present  A3  Least Concern 
Green Hylia Hylia prasina resident  1999  present  A3  Least Concern 
Green Crombec Sylvietta virens resident  1999  present  A3  Least Concern 
Lemon-bellied Crombec Sylvietta denti resident  1999  present  A3  Least Concern 
Forest Robin Stiphrornis erythrothorax resident  1999  unknown  A3  Least Concern 
White-browed Forest Flycatcher Fraseria cinerascens 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 
Johanna's Sunbird Nectarinia johannae resident  1999  present  A3  Least Concern 
Vieillot's Black Weaver Ploceus nigerrimus resident  1999  present  A3  Least Concern 
Red-vented Malimbe Malimbus scutatus resident  1999  present  A3  Least Concern 
Red-headed Malimbe Malimbus rubricollis resident  1999  present  A3  Least Concern 
Chestnut-breasted Negrofinch Nigrita bicolor resident  1999  present  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  1999  present  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Baissa Forest Reserve 9,506 protected area contained by site 0  
Bissaula Forest Reserve 22,236 protected area contained by site 0  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Savanna   27%
Forest   72%

Land use

Land-use Extent (% of site)
agriculture -
forestry -
hunting -
nature conservation and research -
water management -
other -
Notes: Fruit collecting.

Other biodiversity The mammals Syncerus caffer (LR/cd) and Pan troglodytes (VU) occur.

References Hopkins et al. (1999), Payne et al. (1997).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Donga river basin forests. Downloaded from http://www.birdlife.org on 28/08/2014

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