Nature, on the island of Nosy Be as well as in the surrounding islands, is very preserved. Several reasons :
- On one hand, very little pollution. There are very few cars, coaches, trucks, and road infrastructure is very limited: a large part of the island is only accessible by track or footpath, which also limits agriculture to coastal areas, preserving areas of primary forest, and its original biodiversity.
- In addition, Nosy Be has a low human density, and a low tourist development on 90% of the island (do not mix the island of Nosy Be with the tourist area of Ambatoloaka and Madirokely). On the vast majority of the island, living beings are therefore sheltered from atmospheric pollution, noise, excessive attendance, and modification of the biotope by human hands.

Biodiversity, a preserved island : Nosy Be