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Location Equatorial Guinea, Bioko
Central coordinates 8o 33.00' East  3o 21.00' North
IBA criteria A1, A2
Area 51,000 ha
Altitude 0 - 2,261m
Year of IBA assessment 2001

Site description This site, centred on the volcanic Mount Luba in southern Bioko, is one of the wettest places in the world; annual rainfall may reach 10,000 mm. It includes the only undisturbed lowland forest on Bioko which merges, in an unbroken catena, into montane forest above 800 m. The terrain is extremely rugged. There is one village within the reserve, with fewer than 200 inhabitants, while some 2,000 people, living along its borders or close to them, make use of the site.

Key Biodiversity See Box and Table 2 for key species. To date, 120 species have been recorded, but future fieldwork may be expected to reveal more. Those so far recorded, in addition to the endemic Batis poensis (found only in lowland forest), include 35 species which occur as endemic races on Bioko. This site is the only place in Bioko where populations of larger, hunted species such as Ceratogymna atrata and Bostrychia hagedash occur.

Non-bird biodiversity: Five primate species of global conservation concern occur; Cercopithecus preussi (EN), C. erythrotis (VU), Colobus satanas (VU), Procolobus badius (LR/nt) and Mandrillus leucophaeus (VU). The population of the last is possibly the largest remaining. Four species of turtle—Chelonia mydas (EN), Eretmochelys imbricata (CR), Lepidochelys olivacea (EN) and Dermochelys coriacea (EN)—nest on the southern beaches.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Fernando Po Batis Batis poensis resident  2000  present  A2  Least Concern 
Grey-necked Picathartes Picathartes oreas resident  2000  present  A1, A2  Vulnerable 
Cameroon Mountain Saw-wing Psalidoprocne fuliginosa resident  2000  present  A1, A2  Least Concern 
Green Longtail Urolais epichlorus resident  2000  present  A2  Least Concern 
Western Mountain Greenbul Andropadus tephrolaemus resident  2000  present  A2  Least Concern 
Cameroon Olive Greenbul Phyllastrephus poensis resident  2000  present  A2  Least Concern 
White-tailed Warbler Poliolais lopezi resident  2000  present  A2  Near Threatened 
Black-capped Woodland-warbler Phylloscopus herberti resident  2000  present  A2  Least Concern 
Cameroon Sunbird Nectarinia oritis resident  2000  present  A2  Least Concern 
Ursula's Sunbird Nectarinia ursulae resident  2000  present  A1, A2  Near Threatened 
Fernando Po Oliveback Nesocharis shelleyi resident  2000  present  A2  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Caldera de Luba Scientific Reserve 51,000 is identical to site 51,000  


IUCN habitat Habitat detail Extent (% of site)
Artificial - terrestrial   6%
Unknown   11%
Forest   81%

Land use

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

References Butynski (1996), Butynski and Koster (1994), Butynski et al. (1996), Eisentraut (1973), Exell (1973), FAO (1992), Fernández Casas and Morales (1995), García (1996), Pérez del Val (1996), Pérez del Val et al. (1994), Pérez del Val et al. (1995), Tomás et al. (1999).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Luba Caldera Scientific Reserve. Downloaded from on 23/10/2016

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