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Location Madagascar, Mahajanga
Central coordinates 47o 59.00' East  14o 13.00' South
IBA criteria A1, A3, A4i
Area 59,080 ha
Altitude 0 - 355m
Year of IBA assessment 2001

Asity Madagascar (Affiliate)

Site description The site comprises the Sahamalaza peninsula, the 30-km-long bay itself, the mangrove to the east of the peninsula (8,400 ha) and the coral reefs to the west (more than 10,000 ha). The peninsula has steep slopes, rising to 170 m in the southern part. Its west coast is stony and rocky, with mangroves. The principal rivers flowing into the bay are the Andranomalaza, which passes the town of Maromandia, and the Manamboro and Samonta, which lie to the south. On the slopes, the vestiges of a dense, dry deciduous forest form two blocks, situated in the south (Analavory Forest) and west (north of Ambinda village) of the peninsula. The dominant tree species include Dalbergia, Albizia and Tamarindus. The north-eastern part has been cleared of forest, but seems to be regenerating. In the mangroves, all eight mangrove tree species found in Madagascar are present, and can reach more than 8 m in height.

Key Biodiversity See Box and Table 3 for key species. The site is important for several pairs of Haliaeetus vociferoides and large flocks of Sterna bengalensis.

Non-bird biodiversity: Lemurs: Phaner furcifer (nt), Eulemur macaco flavifrons (CR), Hapalemur griseus occidentalis (VU), Lepilemur dorsalis (VU), Avahi occidentalis (VU), Daubentonia madagascariensis (EN). Carnivore: Cryptoprocta ferox (VU).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Madagascar Crested Ibis Lophotibis cristata resident  1997  present  A1  Near Threatened 
Madagascar Pond-heron Ardeola idae breeding  1997  present  A1  Endangered 
Madagascar Heron Ardea humbloti resident  1997  present  A1, A3  Endangered 
Madagascar Fish-eagle Haliaeetus vociferoides resident  1997  2-3 breeding pairs  A1, A3  Critically Endangered 
Lesser Crested Tern Thalasseus bengalensis non-breeding  1997  575 individuals  A4i  Least Concern 
Sakalava Weaver Ploceus sakalava resident  1997  present  A3  Least Concern 

Land use

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

References Andriamanandratra (1996), Andrianantenaina (1996), Commission Nationale Malgache pour l’UNESCO (1998), Iltis (1996), Rakotondravony (1996), Raselimanana (1995), Ravokatra (1996).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Sahamalaza - Radama Islands National Marine Park. Downloaded from on 24/10/2016

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