email a friend
printable version
Location Madagascar, Antsiranana
Central coordinates 48o 51.00' East  12o 12.00' South
IBA criteria A1, A3, A4i
Area 565 ha
Altitude 0 - 130m
Year of IBA assessment 2001

Asity Madagascar (Affiliate)



Site description The site consists of 12 main islets, in three groups: (1) northern sandy islets: Nosy Foty (6 ha), Nosy Fasy (5 ha), Nosy Faty (1 ha) and Nosy Hao (10 ha); (2) northern rocky islets: Nosy Hara (115 ha), Nosy Vaha (1 ha), Nosy Lakandava (5 ha) and Nosy Anjombavola (30 ha); and (3) southern islets: Nosy Anambo (10 ha), Nosy Valiha (150 ha), Nosy Tanga (50 ha) and Nosy Manonoka (75 ha). The northern rocky islets are karstic and covered by a mixture of grassy vegetation and xerophilous shrubland including Pachypodium. The sandy islets are flat, covered by grass, Ipomoea mats and small Casuarina trees. The southern islets are more or less rocky, except Nosy Anambo, which is flat and sandy. The rocky islets are often covered by trees and palms such as Bismarckia. The islets are surrounded by coral reefs. Four other rocky islets north of Manonoka also support some breeding bird species.

Key Biodiversity See Box and Table 3 for key species. The site is home to two pairs of Haliaeetus vociferoides: one pair on Nosy Tanga, next to Cape St Sébastien, and one pair on Nosy Hara in the centre of the archipelago. Significant numbers of terns, including Sterna caspia, S. dougallii, S. fuscata, S. bengalensis, Anous tenuirostris and A. stolidus, have been observed on Nosy Fasy, Nosy Foty, Nosy Faty and Nosy Valiha, not all of them breeding. In July 1997, on Nosy Fasy, about 600 pairs of S. bergii (with 50 young) and 2,000 pairs of S. fuscata were recorded, while on Nosy Foty there were 1,500 pairs of S. bergii (60% breeding, with c.300 young), 30 pairs of S. fuscata and 50 pairs of S. caspia (with young), and on Nosy Faty there was a flock of S. dougallii.

Non-bird biodiversity: Marine turtles are present.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Madagascar Fish-eagle Haliaeetus vociferoides resident  1997  2 breeding pairs  A1, A3  Critically Endangered 
Lesser Crested Tern Thalasseus bengalensis breeding  1997  350 individuals  A4i  Least Concern 
Greater Crested Tern Thalasseus bergii breeding  1997  3,200 individuals  A4i  Least Concern 
Roseate Tern Sterna dougallii breeding  1997  500 individuals  A4i  Least Concern 

Land use

Land-use Extent (% of site)
other -
Notes: Massive collection of eggs of seabirds, esp. terns Sterna.
not utilised -

References Commission Nationale Malgache pour l’UNESCO (1998), Langrand (1987), Rabarisoa (1994), Rabarisoa et al. (1995), Watson et al. (1993).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Cape Anorontany archipelago. Downloaded from http://www.birdlife.org on 22/11/2014

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