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Location Gabon, Ogooué-Ivindo
Central coordinates 12o 43.00' East  0o 28.00' North
IBA criteria A1, A2, A3
Area 10,000 ha
Altitude 450 - 550m
Year of IBA assessment 2001





Site description Ipassa, also known as Mpassa, is situated in north-east Gabon, west of the town of Makokou. It consists mainly of moist lowland evergreen rainforest, located on a plateau at 450–550 m elevation and drained by small tributaries of the Ivindo river, which forms the southern boundary of the reserve. There are also some areas of mixed swamp-forests in valleys and near streams. Around the headquarters of the reserve’s biological research station, and between it and Makokou, 12 km distant, the vegetation has been much modified and includes extensive fallow and cultivated fields. Rocky islets appear in the Ivindo river during dry seasons.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Guineafowl Agelastes niger resident  1999  present  A3  Least Concern 
Plumed Guineafowl Guttera plumifera resident  1999  present  A3  Least Concern 
Forest Francolin Francolinus lathami resident  1999  present  A3  Least Concern 
Hartlaub's Duck Pteronetta hartlaubii resident  1999  present  A1, A3  Least Concern 
Spot-breasted Ibis Bostrychia rara 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  present  A3  Least Concern 
Red-thighed Sparrowhawk Accipiter erythropus resident  1999  present  A3  Least Concern 
Long-tailed Hawk Urotriorchis macrourus resident  1999  present  A3  Least Concern 
Cassin's Hawk-eagle Aquila africanus resident  1999  present  A3  Least Concern 
White-spotted Flufftail Sarothrura pulchra resident  1999  present  A3  Least Concern 
Nkulengu Rail Himantornis haematopus resident  1999  present  A3  Least Concern 
Grey-throated Rail Canirallus oculeus resident  1999  present  A3  Least Concern 
Afep Pigeon Columba unicincta resident  1999  present  A3  Least Concern 
Western Bronze-naped Pigeon Columba iriditorques resident  1999  present  A3  Least Concern 
Blue-headed Wood-dove Turtur brehmeri resident  1999  present  A3  Least Concern 
Black-collared Lovebird Agapornis swindernianus resident  1999  present  A3  Least Concern 
Psittacus erithacus resident  1999  present  A3  Not Recognised 
Guinea Turaco Tauraco persa resident  1999  present  A3  Least Concern 
Yellow-billed Turaco Tauraco macrorhynchus resident  1999  present  A3  Least Concern 
Dusky Long-tailed Cuckoo Cercococcyx mechowi resident  1999  present  A3  Least Concern 
Olive Long-tailed Cuckoo Cercococcyx olivinus resident  1999  present  A3  Least Concern 
Yellow-throated Cuckoo Chrysococcyx flavigularis resident  1999  present  A3  Least Concern 
Gabon Coucal Centropus anselli resident  1999  present  A3  Least Concern 
Fraser's Eagle-owl Bubo poensis resident  1999  present  A3  Least Concern 
Shelley's Eagle-owl Bubo shelleyi resident  1999  present  A3  Near Threatened 
Akun Eagle-owl Bubo leucostictus resident  1999  present  A3  Least Concern 
Vermiculated Fishing-owl Scotopelia bouvieri resident  1999  present  A3  Least Concern 
Maned Owl Jubula lettii resident  1999  present  A3  Data Deficient 
Sjostedt's Owlet Glaucidium sjostedti resident  1999  present  A3  Least Concern 
Brown Nightjar Caprimulgus binotatus resident  1999  present  A3  Least Concern 
Bates's Nightjar Caprimulgus batesi resident  1999  present  A3  Least Concern 
Black Spinetail Telacanthura melanopygia 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  present  A3  Least Concern 
Bare-cheeked Trogon Apaloderma aequatoriale resident  1999  present  A3  Least Concern 
Blue-throated Roller Eurystomus gularis resident  1999  present  A3  Least Concern 
Chocolate-backed Kingfisher Halcyon badia resident  1999  present  A3  Least Concern 
African Dwarf-kingfisher Ceyx lecontei resident  1999  present  A3  Least Concern 
White-bellied Kingfisher Alcedo 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 
Black-headed Bee-eater Merops breweri resident  1999  present  A3  Least Concern 
Black Dwarf Hornbill Tockus hartlaubi resident  1999  present  A3  Least Concern 
Red-billed Dwarf Hornbill Tockus camurus resident  1999  present  A3  Least Concern 
African Pied Hornbill Tockus fasciatus resident  1999  present  A3  Least Concern 
White-crested Hornbill Tropicranus albocristatus resident  1999  present  A3  Least Concern 
Piping Hornbill Bycanistes fistulator resident  1999  present  A3  Least Concern 
Black-and-white-casqued Hornbill Bycanistes subcylindricus resident  1999  present  A3  Least Concern 
White-thighed Hornbill Bycanistes albotibialis resident  1999  present  A3  Least Concern 
Black-casqued Hornbill Ceratogymna atrata resident  1999  present  A3  Least Concern 
Naked-faced Barbet Gymnobucco calvus resident  1999  present  A3  Least Concern 
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  present  A3  Least Concern 
Yellow-throated Tinkerbird Pogoniulus subsulphureus resident  1999  present  A3  Least Concern 
Yellow-spotted Barbet Buccanodon duchaillui resident  1999  present  A3  Least Concern 
Hairy-breasted Barbet Tricholaema hirsuta resident  1999  present  A3  Least Concern 
Yellow-billed Barbet Trachyphonus purpuratus resident  1999  present  A3  Least Concern 
Cassin's Honeyguide Prodotiscus insignis resident  1999  present  A3  Least Concern 
Zenker's Honeyguide Melignomon zenkeri resident  1999  present  A3  Least Concern 
Spotted Honeyguide Indicator maculatus resident  1999  present  A3  Least Concern 
Willcocks's Honeyguide Indicator willcocksi resident  1999  present  A3  Least Concern 
Lyre-tailed Honeyguide Melichneutes robustus resident  1999  present  A3  Least Concern 
African Piculet Sasia africana resident  1999  present  A3  Least Concern 
Buff-spotted Woodpecker Campethera nivosa resident  1999  present  A3  Least Concern 
Brown-eared Woodpecker Campethera caroli resident  1999  present  A3  Least Concern 
Gabon Woodpecker Dendropicos gabonensis resident  1999  present  A3  Least Concern 
Golden-crowned Woodpecker Thripias xantholophus resident  1999  present  A3  Least Concern 
Grey-headed Broadbill Smithornis sharpei resident  1999  present  A3  Least Concern 
Rufous-sided Broadbill Smithornis rufolateralis resident  1999  present  A3  Least Concern 
Green-breasted Pitta Pitta reichenowi resident  1999  present  A3  Least Concern 
African Shrike-flycatcher Megabyas flammulatus resident  1999  present  A3  Least Concern 
Gabon Batis Batis minima resident  1999  present  A1, A2, A3  Near Threatened 
West African Batis Batis occulta resident  1999  present  A3  Least Concern 
Chestnut Wattle-eye Platysteira castanea resident  1999  present  A3  Least Concern 
White-spotted Wattle-eye Platysteira tonsa resident  1999  present  A3  Least Concern 
Black-necked Wattle-eye Platysteira chalybea resident  1999  present  A3  Least Concern 
Chestnut-bellied Helmet-shrike Prionops caniceps resident  1999  present  A3  Least Concern 
Grey-green Bush-shrike Telophorus bocagei resident  1999  present  A3  Least Concern 
Fiery-breasted Bush-shrike Malaconotus cruentus resident  1999  present  A3  Least Concern 
Red-eyed Puffback Dryoscopus senegalensis resident  1999  present  A3  Least Concern 
Large-billed Puffback Dryoscopus sabini 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 
Eastern Wattled Cuckooshrike Campephaga oriolina resident  1999  present  A3  Data Deficient 
Western Black-headed Oriole Oriolus brachyrhynchus resident  1999  present  A3  Least Concern 
Black-winged Oriole Oriolus nigripennis resident  1999  present  A3  Least Concern 
Shining Drongo Dicrurus atripennis resident  1999  present  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 
Rufous-vented Paradise-flycatcher Terpsiphone rufocinerea resident  1999  present  A3  Least Concern 
Dusky Crested-flycatcher Elminia nigromitrata resident  1999  present  A3  Least Concern 
Chestnut-capped Flycatcher Erythrocercus mccallii resident  1999  present  A3  Least Concern 
Dusky Tit Parus funereus resident  1999  present  A3  Least Concern 
Forest Penduline-tit Anthoscopus flavifrons resident  1999  present  A3  Least Concern 
Tit-hylia Pholidornis rushiae resident  1999  present  A3  Least Concern 
African River-martin Pseudochelidon eurystomina breeding  1999  unknown  A1, A3  Data Deficient 
Square-tailed Saw-wing Psalidoprocne nitens resident  1999  present  A3  Least Concern 
White-throated Blue Swallow Hirundo nigrita resident  1999  present  A3  Least Concern 
Forest Swallow Hirundo fuliginosa resident  1999  present  A2, A3  Least Concern 
Chattering Cisticola Cisticola anonymus resident  1999  present  A3  Least Concern 
Black-capped Apalis Apalis nigriceps resident  1999  present  A3  Least Concern 
Masked Apalis Apalis binotata resident  1999  present  A3  Least Concern 
Apalis rufogularis resident  1999  present  A3  Not Recognised 
Gosling's Apalis Apalis goslingi resident  1999  present  A3  Least Concern 
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  present  A3  Least Concern 
Plain Greenbul Andropadus curvirostris resident  1999  present  A3  Least Concern 
Golden Greenbul Calyptocichla serina resident  1999  present  A3  Least Concern 
Honeyguide Greenbul Baeopogon indicator resident  1999  present  A3  Least Concern 
White-tailed Greenbul Baeopogon clamans resident  1999  present  A3  Least Concern 
Spotted Greenbul Ixonotus guttatus resident  1999  present  A3  Least Concern 
Simple Greenbul Chlorocichla simplex resident  1999  present  A3  Least Concern 
Yellow-necked Greenbul Chlorocichla falkensteini resident  1999  present  A3  Least Concern 
Swamp Greenbul Thescelocichla leucopleura resident  1999  present  A3  Least Concern 
Leaf-love Pyrrhurus scandens resident  1999  present  A3  Least Concern 
White-throated Greenbul Phyllastrephus albigularis resident  1999  present  A3  Least Concern 
Icterine Greenbul Phyllastrephus icterinus resident  1999  present  A3  Least Concern 
Xavier's Greenbul Phyllastrephus xavieri 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 
Green-backed Bulbul Criniger chloronotus resident  1999  present  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  1999  present  A3  Least Concern 
White-bearded Bulbul Criniger ndussumensis resident  1999  present  A3  Least Concern 
Yellow-spotted Nicator Nicator chloris resident  1999  present  A3  Least Concern 
Yellow-throated Nicator Nicator vireo 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  present  A3  Least Concern 
Green Hylia Hylia prasina resident  1999  present  A3  Least Concern 
Rufous-crowned Eremomela Eremomela badiceps 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 
Blackcap Illadopsis Illadopsis cleaveri resident  1999  present  A3  Least Concern 
Brown Illadopsis Illadopsis fulvescens resident  1999  present  A3  Least Concern 
Purple-headed Glossy-starling Lamprotornis purpureiceps resident  1999  present  A3  Least Concern 
Chestnut-winged Starling Onychognathus fulgidus resident  1999  present  A3  Least Concern 
Narrow-tailed Starling Poeoptera lugubris resident  1999  present  A3  Least Concern 
White-tailed Ant-thrush Neocossyphus poensis resident  1999  present  A3  Least Concern 
Rufous Flycatcher-thrush Stizorhina fraseri resident  1999  present  A3  Least Concern 
Black-eared Ground-thrush Zoothera camaronensis resident  1999  present  A3  Least Concern 
Grey Ground-thrush Zoothera princei resident  1999  present  A3  Least Concern 
Alethe diademata resident  1999  present  A3  Not Recognised 
Forest Robin Stiphrornis erythrothorax resident  1999  present  A3  Least Concern 
Lowland Akalat Sheppardia cyornithopsis resident  1999  present  A3  Least Concern 
Blue-shouldered Robin-chat Cossypha cyanocampter resident  1999  present  A3  Least Concern 
African Forest Flycatcher Fraseria ocreata resident  1999  present  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 
Olivaceous Flycatcher Muscicapa olivascens resident  1999  present  A3  Least Concern 
Little Grey Flycatcher Muscicapa epulata resident  1999  present  A3  Least Concern 
Yellow-footed Flycatcher Muscicapa sethsmithi resident  1999  present  A3  Least Concern 
Dusky-blue Flycatcher Muscicapa comitata resident  1999  present  A3  Least Concern 
Cassin's Grey Flycatcher Muscicapa cassini resident  1999  present  A3  Least Concern 
Grey-throated Tit-flycatcher Myioparus griseigularis resident  1999  present  A3  Least Concern 
Scarlet-tufted Sunbird Anthreptes fraseri resident  1999  present  A3  Least Concern 
Mouse-brown Sunbird Anthreptes gabonicus resident  1999  present  A3  Least Concern 
Violet-tailed Sunbird Anthreptes aurantium resident  1999  present  A3  Least Concern 
Green Sunbird Anthreptes rectirostris resident  1999  present  A3  Least Concern 
Little Green Sunbird Nectarinia seimundi resident  1999  present  A3  Least Concern 
Bates's Sunbird Nectarinia batesi resident  1999  present  A3  Least Concern 
Reichenbach's Sunbird Nectarinia reichenbachii resident  1999  present  A3  Least Concern 
Blue-throated Brown Sunbird Nectarinia cyanolaema resident  1999  present  A3  Least Concern 
Green-throated Sunbird Nectarinia rubescens resident  1999  present  A3  Least Concern 
Tiny Sunbird Nectarinia minulla resident  1999  present  A3  Least Concern 
Johanna's Sunbird Nectarinia johannae resident  1999  present  A3  Least Concern 
Superb Sunbird Nectarinia superba resident  1999  present  A3  Least Concern 
Orange Weaver Ploceus aurantius 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 
Preuss's Weaver Ploceus preussi resident  1999  present  A3  Least Concern 
Yellow-capped Weaver Ploceus dorsomaculatus resident  1999  present  A3  Least Concern 
Red-crowned Malimbe Malimbus coronatus resident  1999  present  A3  Least Concern 
Black-throated Malimbe Malimbus cassini resident  1999  present  A3  Least Concern 
Rachel's Malimbe Malimbus racheliae resident  1999  present  A2, A3  Least Concern 
Red-bellied Malimbe Malimbus erythrogaster 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 
Red-headed Malimbe Malimbus rubricollis resident  1999  present  A3  Least Concern 
Woodhouse's Antpecker Parmoptila woodhousei resident  1999  present  A3  Least Concern 
White-breasted Negrofinch Nigrita fusconotus resident  1999  present  A3  Least Concern 
Chestnut-breasted Negrofinch Nigrita bicolor resident  1999  present  A3  Least Concern 
Pale-fronted Negrofinch Nigrita luteifrons resident  1999  present  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  1999  present  A3  Least Concern 
Long-legged Pipit Anthus pallidiventris resident  1999  present  A3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ipassa Strict Nature Reserve Faunal Reserve 10,000 is identical to site 10,000  
Réserve naturelle intégrale d'Ipassa-Makokou UNESCO-MAB Biosphere Reserve 15,000 protected area contains site 10,000  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Artificial - terrestrial   1%
Unknown   2%
Forest   96%

Land use

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

Other biodiversity Large mammals Loxodonta africana (EN), Gorilla gorilla (EN) and Pan troglodytes (EN) have been recorded, but their present status is unknown.

References Brosset and Erard (1986), IRET-ECOTROP (CNRS) (1987).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Ipassa Strict Nature Reserve. Downloaded from http://www.birdlife.org on 13/07/2014

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