The National park of Zahamena was created in 1997. Located on the eastern part of the island, 70km northwest of Tamatave and about 25 km east from Lake Alaotra, the protected area has a total surface of 643 km² of which 423Km2 belong to the National Park. The climate is humid, with moderate temperatures whole the year. The Park Office is located at Antanandava. The park is divided into two areas which are partially separated by a corridor that includes several villages. It is not very well known area as National Park. The landscape is very hilly. Vegetation changes according to the altitude. Zahamena National Park shelters an incredibly rich biodiversity.
There are 45 mammal species, 13 of them are lemurs, such as diademed sifaka, black-and-white ruffed lemur, indri-indri, hairy-eared dwarf lemur, aye-aye or the local endemic and endangered Lake Alaotra bamboo lemur. A total of 112 bird species have been observed into the park, 67 of them are endemic to Madagascar. Some emblematic species are the Madagascar serpent eagle, red owl, red-tailed newtonia, crested ibis, brown mesite, blue coua, velvet asity or helmet vanga. Apart from that, there are 29 species of fishes, 62 of amphibians and 46 reptiles, like the Madagascar big eyed gecko. The list of the flora contains 60 orchids, 20 palms and more than 500 woody plants.