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Location Madagascar, Mahajanga
Central coordinates 44o 23.00' East  18o 56.00' South
IBA criteria A1, A2, A3, A4i
Area 35,470 ha
Altitude 7 - 80m
Year of IBA assessment 2001

Asity Madagascar (Affiliate)

Site description Lakes Ankerika, Antsamaka, Soamalipo and Befotaka form the wetlands of the Manambolomaty complex, 35 km south-west of Antsalova, and are surrounded by the Tsimembo Forest. Lake Ankerika is located in the commune of Trangahy, and the three others in the commune of Masoarivo. Lakes Soamalipo and Befotaka are linked. The lakes lie on alluvial soils and most are freshwater and permanent, with a depth of 3–6 m depending on the season. Lake Antsamaka is brackish and 3 m deep during the rainy season, but may completely dry up at the end of the dry season. Aquatic vegetation at this lake includes water-lilies Nymphaea and rushes Juncus. In the southern part of the lakes, an area of 98 ha has been converted to seasonal marshes and rice-fields. Tsimembo Forest is bounded by the Manambolomaty river in the south and by the Beboka river in the north, and consists of dense, dry deciduous forest. Dominant canopy trees include Dalbergia, Stereospermum, Givotia, Xylia, Cordyla, Hildegardia, Delonix and Diospyros. The mid-stratum is dominated by species of Rubiaceae, Euphorbiaceae and Leguminosae. On patches of much sandier soil (old sand-dunes), the forest canopy is lower and there are fewer emergents. The part of the Tsimembo Forest that surrounds Lake Antsamaka is called Ankotrofotsy Forest.

Key Biodiversity See Box and Tables 2 and 3 for key species. Ninety-three species are known from the site, of which 29 are endemic to Madagascar. The site holds 10 pairs of Haliaeetus vociferoides, representing c.10% of the world population. There is an islet which is a roosting and nesting site for herons (Ardeidae) such as Ardea humbloti, and for Anas bernieri.

Non-bird biodiversity: Lemurs: Phaner furcifer pallescens (VU), Hapalemur griseus occidentalis (VU), Propithecus verreauxi deckeni (VU). Carnivore: Cryptoprocta ferox (VU). Reptile: Erymnochelys madagascariensis (EN).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Madagascar Teal Anas bernieri resident  1993-1994  35 individuals  A1, A2, A3  Endangered 
Lesser Flamingo Phoeniconaias minor non-breeding  1993-1994  present  A1  Near Threatened 
Madagascar Crested Ibis Lophotibis cristata resident  1993-1994  present  A1  Near Threatened 
African Spoonbill Platalea alba non-breeding  1993-1994  401 individuals  A4i  Least Concern 
Madagascar Pond-heron Ardeola idae breeding  1993-1994  present  A1  Endangered 
Madagascar Heron Ardea humbloti resident  1993-1994  440 individuals  A1, A2, A3, A4i  Endangered 
Madagascar Fish-eagle Haliaeetus vociferoides resident  1995  10 breeding pairs  good  A1, A2, A3  Critically Endangered 
Henst's Goshawk Accipiter henstii resident  1993-1994  present  A1  Near Threatened 
Black-banded Plover Charadrius thoracicus resident  1993-1994  present  A1, A2, A3  Vulnerable 
Madagascar Jacana Actophilornis albinucha resident  1993-1994  present  A2  Near Threatened 
Giant Coua Coua gigas resident  1993-1994  present  A3  Least Concern 
Coquerel's Coua Coua coquereli resident  1993-1994  present  A2, A3  Least Concern 
Sickle-billed Vanga Falculea palliata resident  1993-1994  present  A3  Least Concern 
Sakalava Weaver Ploceus sakalava resident  1993-1994  present  A3  Least Concern 

IBA Monitoring

2001 high not assessed not assessed
Good - based on reliable and complete / representative data

Agriculture and aquaculture annual & perennial non-timber crops - small-holder farming happening now some of area/population (10-49%) moderate to rapid deterioration high
Agriculture and aquaculture livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Biological resource use logging & wood harvesting - unintentional effects: subsistence/small scale happening now some of area/population (10-49%) moderate to rapid deterioration high

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Complexe des lacs de Manambolomaty Wetlands of International Importance (Ramsar) 7,491 protected area contained by site 7,491  
Tsimembo Forest Reserve 13,900 protected area contained by site 13,900  

Land use

Land-use Extent (% of site)
agriculture -
forestry -
nature conservation and research -
water management -

References Langrand (1987), Rabarisoa et al. (1995), Ramanitra and Randrianasolo (1994), Ramanitra et al. (1993), Watson et al. (1993), World Wide Fund for Nature–Madagascar (1997).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Manambolomaty wetland complex and Tsimembo Classified Forest. Downloaded from on 24/10/2016

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