This site is located about 13 km north-east of Ambilobe. It is spread over three elongated mountains (aligned south-west to north-east)—Bobavato, Ambohibe and Andavakoera—between which are large, flat valleys. The south-eastern part of the site is bounded by a cliff. The topography is pronounced, with very steep slopes and areas of exposed bedrock. Three main rivers flow across the site: the Ambararata, which has its source on Andavakoera mountain and flows towards the south-east, and the Maharenina and Mananjeba, which flow down the valleys towards the south-west. The forest is mostly dry deciduous, in particular on the peaks and slopes. The remaining vegetation, notably the gallery forests, is composed of low- 127>altitude, dense humid forest. The forest block on Andavakoera mountain is intact. Dominant trees include Canarium, Dalbergia, Hernandia, Eugenia, Capurodendron, Diospyros, Albizia and Commiphora. Secondary woodland covers the slopes of Ambohibe and Bobavato mountains in the north and the west of the site. Savanna, with few or no trees/shrubs, occurs adjacent to the gallery forests.
See Box and Table 3 for key species. Sixty-two species are known from the site, of which 30 are endemic to Madagascar. Species characteristic of both dry forest (e.g. Falculea palliata) and wet forest (e.g. Caprimulgus enarratus, Phyllastrephus zosterops and Coua caerulea) are present.