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Location Congo, The Democratic Republic of the, Equateur
Central coordinates 18o 30.00' East  1o 0.00' North
IBA criteria A1, A3, A4i, A4ii
Area 250,000 ha
Altitude 350 - 400m
Year of IBA assessment 2001





Site description The site is a large, remote area of swamp-forest crossed by numerous rivers and streams, situated between the Ubangi river in the west and the Congo river in the east. The whole triangular-shaped area between 02°00 N and the confluence of the two major rivers in the south is included in this site; the same habitat extends, however, further to the north, at least to 02°30 N. The Ngiri river, a tributary of the Ubangi, flows from north to south through the centre of the site and is bordered by a wide zone of marshy grassland-savanna (‘ésobé’), alternating with swamp-forests and periodically flooded forests. Typical tree species include Entandrophragma palustre, Coelocaryon botryoides, Uapaca heudelotii, Guibourtia demeusei and Oubanguia africana. In periods of low water the savanna is burnt; when waters are high it is completely flooded. The human population density is very low and settlements are mainly concentrated around the only town in the area, Bomongo. Fishing and hunting are the main activities. Mbandaka, the regional capital, is situated to the south, at the confluence of the Congo and Ruki rivers. Rainfall averages about 1,770 mm per year, with little seasonal variation but with maxima during August–October and minima during April–May. Water-levels are highest during September–November in the Ubangi and Ngiri, and during October–December in the Congo; water-levels are low during January–May and February–August, respectively.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Forest Francolin Francolinus lathami resident  2000  unknown  A3  Least Concern 
Hartlaub's Duck Pteronetta hartlaubii resident  2000  unknown  A1, A3  Least Concern 
Spot-breasted Ibis Bostrychia rara resident  2000  present  A3  Least Concern 
White-crested Tiger-heron Tigriornis leucolopha resident  2000  unknown  A3  Least Concern 
Congo Serpent-eagle Dryotriorchis spectabilis resident  2000  unknown  A3  Least Concern 
Chestnut-flanked Sparrowhawk Accipiter castanilius resident  2000  unknown  A3  Least Concern 
Red-thighed Sparrowhawk Accipiter erythropus resident  2000  unknown  A3  Least Concern 
Long-tailed Hawk Urotriorchis macrourus resident  2000  unknown  A3  Least Concern 
Cassin's Hawk-eagle Aquila africanus resident  2000  unknown  A3  Least Concern 
White-spotted Flufftail Sarothrura pulchra resident  2000  unknown  A3  Least Concern 
Nkulengu Rail Himantornis haematopus resident  2000  unknown  A3  Least Concern 
Grey-throated Rail Canirallus oculeus resident  2000  unknown  A3  Least Concern 
Afep Pigeon Columba unicincta resident  2000  unknown  A3  Least Concern 
Western Bronze-naped Pigeon Columba iriditorques resident  2000  unknown  A3  Least Concern 
Blue-headed Wood-dove Turtur brehmeri resident  2000  unknown  A3  Least Concern 
Black-collared Lovebird Agapornis swindernianus resident  2000  unknown  A3  Least Concern 
Psittacus erithacus resident  2000  unknown  A3  Not Recognised 
Guinea Turaco Tauraco persa resident  2000  unknown  A3  Least Concern 
Dusky Long-tailed Cuckoo Cercococcyx mechowi resident  2000  unknown  A3  Least Concern 
Olive Long-tailed Cuckoo Cercococcyx olivinus resident  2000  unknown  A3  Least Concern 
Yellow-throated Cuckoo Chrysococcyx flavigularis resident  2000  unknown  A3  Least Concern 
Gabon Coucal Centropus anselli resident  2000  unknown  A3  Least Concern 
Fraser's Eagle-owl Bubo poensis resident  2000  unknown  A3  Least Concern 
Akun Eagle-owl Bubo leucostictus resident  2000  unknown  A3  Least Concern 
Vermiculated Fishing-owl Scotopelia bouvieri resident  2000  unknown  A3  Least Concern 
Maned Owl Jubula lettii resident  2000  unknown  A3  Data Deficient 
Red-chested Owlet Glaucidium tephronotum resident  2000  unknown  A3  Least Concern 
Sjostedt's Owlet Glaucidium sjostedti resident  2000  unknown  A3  Least Concern 
Bates's Nightjar Caprimulgus batesi resident  2000  unknown  A3  Least Concern 
Sabine's Spinetail Rhaphidura sabini resident  2000  unknown  A3  Least Concern 
Cassin's Spinetail Neafrapus cassini resident  2000  unknown  A3  Least Concern 
Blue-throated Roller Eurystomus gularis resident  2000  unknown  A3  Least Concern 
White-bellied Kingfisher Alcedo leucogaster resident  2000  unknown  A3  Least Concern 
Black Bee-eater Merops gularis resident  2000  unknown  A3  Least Concern 
Merops muelleri resident  2000  unknown  A3  Not Recognised 
Black-headed Bee-eater Merops breweri resident  2000  unknown  A3  Least Concern 
Rosy Bee-eater Merops malimbicus breeding  870 breeding pairs  A3, A4ii  Least Concern 
Black Dwarf Hornbill Tockus hartlaubi resident  2000  unknown  A3  Least Concern 
Red-billed Dwarf Hornbill Tockus camurus resident  2000  unknown  A3  Least Concern 
African Pied Hornbill Tockus fasciatus resident  2000  unknown  A3  Least Concern 
White-crested Hornbill Tropicranus albocristatus resident  2000  unknown  A3  Least Concern 
Piping Hornbill Bycanistes fistulator resident  2000  unknown  A3  Least Concern 
White-thighed Hornbill Bycanistes albotibialis resident  2000  unknown  A3  Least Concern 
Black-casqued Hornbill Ceratogymna atrata resident  2000  unknown  A3  Least Concern 
Sladen's Barbet Gymnobucco sladeni resident  2000  unknown  A3  Least Concern 
Speckled Tinkerbird Pogoniulus scolopaceus resident  2000  unknown  A3  Least Concern 
Red-rumped Tinkerbird Pogoniulus atroflavus resident  2000  unknown  A3  Least Concern 
Yellow-throated Tinkerbird Pogoniulus subsulphureus resident  2000  unknown  A3  Least Concern 
Yellow-spotted Barbet Buccanodon duchaillui resident  2000  unknown  A3  Least Concern 
Hairy-breasted Barbet Tricholaema hirsuta resident  2000  unknown  A3  Least Concern 
Yellow-billed Barbet Trachyphonus purpuratus resident  2000  unknown  A3  Least Concern 
Cassin's Honeyguide Prodotiscus insignis resident  2000  unknown  A3  Least Concern 
Zenker's Honeyguide Melignomon zenkeri resident  2000  unknown  A3  Least Concern 
Spotted Honeyguide Indicator maculatus resident  2000  unknown  A3  Least Concern 
Willcocks's Honeyguide Indicator willcocksi resident  2000  unknown  A3  Least Concern 
Lyre-tailed Honeyguide Melichneutes robustus resident  2000  unknown  A3  Least Concern 
African Piculet Sasia africana resident  2000  unknown  A3  Least Concern 
Buff-spotted Woodpecker Campethera nivosa resident  2000  unknown  A3  Least Concern 
Brown-eared Woodpecker Campethera caroli resident  2000  unknown  A3  Least Concern 
Gabon Woodpecker Dendropicos gabonensis resident  2000  unknown  A3  Least Concern 
Golden-crowned Woodpecker Thripias xantholophus resident  2000  unknown  A3  Least Concern 
Rufous-sided Broadbill Smithornis rufolateralis resident  2000  unknown  A3  Least Concern 
African Shrike-flycatcher Megabyas flammulatus resident  2000  unknown  A3  Least Concern 
Chestnut Wattle-eye Platysteira castanea resident  2000  unknown  A3  Least Concern 
Chestnut-bellied Helmet-shrike Prionops caniceps resident  2000  unknown  A3  Least Concern 
Large-billed Puffback Dryoscopus sabini resident  2000  unknown  A3  Least Concern 
Blue Cuckooshrike Coracina azurea resident  2000  unknown  A3  Least Concern 
Western Black-headed Oriole Oriolus brachyrhynchus resident  2000  unknown  A3  Least Concern 
Black-winged Oriole Oriolus nigripennis resident  2000  unknown  A3  Least Concern 
Black-headed Paradise-flycatcher Terpsiphone rufiventer resident  2000  unknown  A3  Least Concern 
Blue-headed Crested-flycatcher Trochocercus nitens resident  2000  unknown  A3  Least Concern 
Dusky Crested-flycatcher Elminia nigromitrata resident  2000  unknown  A3  Least Concern 
Chestnut-capped Flycatcher Erythrocercus mccallii resident  2000  unknown  A3  Least Concern 
Dusky Tit Parus funereus resident  2000  unknown  A3  Least Concern 
Forest Penduline-tit Anthoscopus flavifrons resident  2000  unknown  A3  Least Concern 
Tit-hylia Pholidornis rushiae resident  2000  unknown  A3  Least Concern 
African River-martin Pseudochelidon eurystomina breeding  2000  unknown  A1, A3  Data Deficient 
Square-tailed Saw-wing Psalidoprocne nitens resident  2000  unknown  A3  Least Concern 
Congo Martin Riparia congica resident  2000  present  A3  Least Concern 
White-throated Blue Swallow Hirundo nigrita resident  2000  unknown  A3  Least Concern 
Apalis rufogularis resident  2000  unknown  A3  Not Recognised 
Gosling's Apalis Apalis goslingi resident  2000  unknown  A3  Least Concern 
Yellow-browed Camaroptera Camaroptera superciliaris resident  2000  unknown  A3  Least Concern 
Olive-green Camaroptera Camaroptera chloronota resident  2000  unknown  A3  Least Concern 
Grey Greenbul Andropadus gracilis resident  2000  unknown  A3  Least Concern 
Ansorge's Greenbul Andropadus ansorgei resident  2000  unknown  A3  Least Concern 
Plain Greenbul Andropadus curvirostris resident  2000  unknown  A3  Least Concern 
Honeyguide Greenbul Baeopogon indicator resident  2000  unknown  A3  Least Concern 
Spotted Greenbul Ixonotus guttatus resident  2000  unknown  A3  Least Concern 
Simple Greenbul Chlorocichla simplex resident  2000  unknown  A3  Least Concern 
Swamp Greenbul Thescelocichla leucopleura resident  2000  unknown  A3  Least Concern 
Leaf-love Pyrrhurus scandens resident  2000  unknown  A3  Least Concern 
Icterine Greenbul Phyllastrephus icterinus resident  2000  unknown  A3  Least Concern 
Common Bristlebill Bleda syndactylus resident  2000  unknown  A3  Least Concern 
Lesser Bristlebill Bleda notatus resident  2000  unknown  A3  Least Concern 
Red-tailed Bulbul Criniger calurus resident  2000  unknown  A3  Least Concern 
White-bearded Bulbul Criniger ndussumensis resident  2000  unknown  A3  Least Concern 
Yellow-spotted Nicator Nicator chloris resident  2000  unknown  A3  Least Concern 
Grey Longbill Macrosphenus concolor resident  2000  unknown  A3  Least Concern 
Violet-backed Hyliota Hyliota violacea resident  2000  unknown  A3  Least Concern 
Green Hylia Hylia prasina resident  2000  unknown  A3  Least Concern 
Rufous-crowned Eremomela Eremomela badiceps resident  2000  unknown  A3  Least Concern 
Green Crombec Sylvietta virens resident  2000  unknown  A3  Least Concern 
Lemon-bellied Crombec Sylvietta denti resident  2000  unknown  A3  Least Concern 
Scaly-breasted Illadopsis Illadopsis albipectus resident  2000  unknown  A3  Least Concern 
Brown Illadopsis Illadopsis fulvescens resident  2000  unknown  A3  Least Concern 
Purple-headed Glossy-starling Lamprotornis purpureiceps resident  2000  unknown  A3  Least Concern 
Chestnut-winged Starling Onychognathus fulgidus resident  2000  unknown  A3  Least Concern 
White-tailed Ant-thrush Neocossyphus poensis resident  2000  unknown  A3  Least Concern 
Rufous Flycatcher-thrush Stizorhina fraseri resident  2000  unknown  A3  Least Concern 
Alethe diademata resident  2000  unknown  A3  Not Recognised 
Forest Robin Stiphrornis erythrothorax resident  2000  unknown  A3  Least Concern 
African Forest Flycatcher Fraseria ocreata resident  2000  unknown  A3  Least Concern 
White-browed Forest Flycatcher Fraseria cinerascens resident  2000  unknown  A3  Least Concern 
Sooty Flycatcher Muscicapa infuscata resident  2000  unknown  A3  Least Concern 
Olivaceous Flycatcher Muscicapa olivascens resident  2000  unknown  A3  Least Concern 
Dusky-blue Flycatcher Muscicapa comitata resident  2000  unknown  A3  Least Concern 
Cassin's Grey Flycatcher Muscicapa cassini resident  2000  unknown  A3  Least Concern 
Scarlet-tufted Sunbird Anthreptes fraseri resident  2000  unknown  A3  Least Concern 
Violet-tailed Sunbird Anthreptes aurantium resident  2000  unknown  A3  Least Concern 
Green Sunbird Anthreptes rectirostris resident  2000  unknown  A3  Least Concern 
Bates's Sunbird Nectarinia batesi resident  2000  unknown  A3  Least Concern 
Reichenbach's Sunbird Nectarinia reichenbachii resident  2000  unknown  A3  Least Concern 
Blue-throated Brown Sunbird Nectarinia cyanolaema resident  2000  unknown  A3  Least Concern 
Green-throated Sunbird Nectarinia rubescens resident  2000  unknown  A3  Least Concern 
Tiny Sunbird Nectarinia minulla resident  2000  unknown  A3  Least Concern 
Congo Sunbird Nectarinia congensis resident  2000  present  A3  Least Concern 
Johanna's Sunbird Nectarinia johannae resident  2000  unknown  A3  Least Concern 
Superb Sunbird Nectarinia superba resident  2000  unknown  A3  Least Concern 
Orange Weaver Ploceus aurantius resident  2000  unknown  A3  Least Concern 
Vieillot's Black Weaver Ploceus nigerrimus resident  2000  unknown  A3  Least Concern 
Yellow-mantled Weaver Ploceus tricolor resident  2000  unknown  A3  Least Concern 
Black-throated Malimbe Malimbus cassini resident  2000  unknown  A3  Least Concern 
Red-bellied Malimbe Malimbus erythrogaster resident  2000  unknown  A3  Least Concern 
Gray's Malimbe Malimbus nitens resident  2000  unknown  A3  Least Concern 
Crested Malimbe Malimbus malimbicus resident  2000  unknown  A3  Least Concern 
Red-headed Malimbe Malimbus rubricollis resident  2000  unknown  A3  Least Concern 
Bob-tailed Weaver Brachycope anomala resident  2000  unknown  A3  Least Concern 
Jameson's Antpecker Parmoptila jamesoni resident  2000  unknown  A3  Least Concern 
White-breasted Negrofinch Nigrita fusconotus resident  2000  unknown  A3  Least Concern 
Chestnut-breasted Negrofinch Nigrita bicolor resident  2000  unknown  A3  Least Concern 
Pale-fronted Negrofinch Nigrita luteifrons resident  2000  unknown  A3  Least Concern 
Grant's Bluebill Spermophaga poliogenys resident  2000  unknown  A3  Least Concern 
Western Bluebill Spermophaga haematina resident  2000  unknown  A3  Least Concern 
Long-legged Pipit Anthus pallidiventris resident  2000  present  A3  Least Concern 

Habitats

IUCN habitat Habitat detail Extent (% of site)
Unknown   1%
Wetlands (inland)   5%
Grassland   2%
Forest   89%

Land use

Land-use Extent (% of site)
fisheries/aquaculture -

Other biodiversity No recent information is available. Mammals of global conservation concern include Loxodonta africana (EN), while Allenopithecus nigroviridis (LR/nt) is thought to occur.

References Herroelen (in prep.), IUCN (1990), Vrijdagh (1954).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Ngiri. Downloaded from http://www.birdlife.org on 10/07/2014

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