The annual rainfall is 900 millimetres (35 in) and can be visited throughout the year, including the wet season (December to March).

Some of the species include Adansonia rubrostipa, commonly known as fony baobab, the ebony tree (Diospyros platycalyx), Euphorbia antso and Hazomalania voyronii which has timber that contains camphor an insect repellent.

Coquerel's sifaka (Propithecus coquereli) was previously found at this site but has since been extirpated.

[4] Mammals found on the reserve include Madame Berthe's mouse lemur (Microcebus berthae), which is evaluated as an endangered species by the International Union for Conservation of Nature (IUCN) and is the smallest species of mouse lemur; an endangered species, Pale fork-marked lemur (Phaner pallescens); red-tailed sportive lemur (Lepilemur ruficaudatus) also vulnerable; and the Fossa (Cryptoprocta ferox), a cat-like, carnivore and also a vulnerable species.

[3] The reserve is threatened by poaching, illegal felling of trees and slash-and-burn agriculture.