is the iconic bird species of Marojejy National Park. Marojejy National Park is noted for its rich biodiversity, which can appeal to both scientist and ecotourist. There are a wide range of habitats within the park, and many of its plants and animals are
endemic to the area. Scientific expeditions regularly discover species that are either not previously documented in Marojejy, or in some cases, completely new to science. Some new species are highly
endangered. In the case of many large groups, such as
invertebrates, very little is known and much remains to be discovered.
Flora The vegetation of Marojejy National Park is extremely diverse due to the various microclimates. The microclimates also affect plant growth rates, with the wet eastern slopes showing faster plant growth, the dry western slopes exhibiting slower plant growth, and the plants on the ridge tops hindered by high winds and poor soils. More than 2,000 species of
flowering plants (angiosperms) have been discovered at the park so far. At least four plant
families are found at all elevations:
Clusiaceae and
Poaceae are generally common, while
Myrsinaceae and
Elaeocarpaceae are rare. There are four basic types of forest found at Marojejy: •
Lowland rainforest: Below , species diversity is the highest due to abundant rainfall, consistently warm weather, and protection from strong winds. The
canopy of the
primary forests is dense with tall trees reaching heights of . Many
tree trunks measure over in diameter. A great variety of
palms,
epiphytes, and
ferns are also present, with 130 species of fern known from this zone.
Secondary growth, which primarily includes bamboo, wild ginger or
longoza (genus
Aframomum), and traveller's palm (
Ravenala madagascariensis), is found in disturbed areas. The most common families of flowering plant are
Sapotaceae,
Rubiaceae,
Euphorbiaceae, and
Myrsinaceae. The most common families of plants in the light
groundcover are Poaceae,
Labiaceae,
Acanthaceae,
Gesneriaceae,
Melastomataceae, and
Balsaminaceae. The lowland rainforest region covers 38% of the surface area of the park. •
Moist montane rainforest: Between and also covering 38% of the surface area of the park, trees and shrubs become increasingly smaller due to lower temperatures and poorer soils, and
tree ferns become more abundant as elevation increases. The lower temperatures cause moisture to condense onto surfaces without forming mist. The transition between the lowland rainforests and the mid-altitude rainforest is gradual. The canopy reaches heights of , and sun-loving epiphytes, shrubs, and other forest floor species take advantage of the elevated light levels. The increased humidity also favors
mosses and ferns. The families Rubiaceae, Euphorbiaceae,
Myrtaceae,
Arecaceae,
Pandanaceae, and
Burseraceae are the most common in this zone. •
Sclerophyllous montane cloudforest: At and covering 11.5% of the surface area of the park, the trees are significantly shorter, gnarled and stunted, with the canopy extending to a maximum height of only . The most common plant families are
Lauraceae, Rubiaceae, Clusiaceae, and
Araliaceae. The ground layer in the
cloud forest is rich, and moss and
lichen drape the branches of the trees. At least 122 species of fern are found in this zone. Temperatures are lower, and heavy clouds brought in by eastern winds blanket the forest. Endemism is very high at this altitude, particularly between the various peaks due to long isolation. The area is also highly susceptible to fire due to its thick layer of
humus. •
Montane scrub: Above on only 1.5% of the surface area of the park, the last remaining mountain
scrub in Madagascar can be found. Unlike all other high mountain scrub on the island, it has not been altered by fire. The region has an open,
tundra-like cover, over thin, rocky soils. Soil conditions, along with the cool temperatures, windy conditions, and low rainfall limits the vegetation, which reaches a maximum height of . Low, dense thickets of shrubs dominate, although terrestrial
orchids and miniature palms and bamboos are also present. The dominant families of plant are Poaceae,
Ericaceae,
Asteraceae,
Balsaminaceae,
Cunoniaceae, and Clusiaceae. Of the many plant species found in Marojejy, 35 are palms, several of which are
critically endangered and have extremely low populations. Only three of these palm species can be found outside of Madagascar, and seven can only be found at Marojejy. More than 275 fern species are present in the rainforests of the massif, 18 of which are tree ferns and seven are found only at Marojejy. Many of these fern species are very rare and have highly restricted distributions. Marojejy also contains several types of rare
rosewood and palisandre (genus
Dalbergia), all of which are endemic to Madagascar. Rosewood, or
andramena in Malagasy, is a type of hardwood with a lustrous deep red color, while palisandre, such as
Dalbergia madagascariensis, lacks the red color. Of the three species of
Dalbergia found in Marojejy,
D. madagascariensis and
D. baronii are listed as "
vulnerable" on the
IUCN Red List, while
D. louvelii is listed as "
endangered". The park has few large specimens of the former two due to
overexploitation, and specimens are rarely found in the surrounding surrounding the park. The latter,
D. louvelii, is not found outside of the park.
Fauna is one of many species of bird found at Marojejy. Marojejy National Park is best known for its two iconic species, the
helmet vanga (
Euryceros prevostii) and the critically endangered
silky sifaka or
simpona (
Propithecus candidus). The silky sifaka has been listed as one of "
The World's 25 Most Endangered Primates" since the inception of the list in 2000. According to estimates, fewer than 1,000 individuals of this species remain, and none exist in captivity. The wealth of species of well-known groups of animals demonstrates the depth of the biodiversity found at Marojejy National Park. For example, 75 of the 118 species of
birds (64%) found in or around Marojejy are forest-dwelling birds, a total that surpasses any other mountain site in Madagascar. All of these forest-dependent bird species are endemic to Madagascar and utilize the forest for some portion of their life-cycle. One of these birds is the
Madagascar serpent-eagle (
Eutriorchis astur), which prior to being reported in 1990, had not been seen by
ornithologists since 1932. In addition to the silky sifaka, Marojejy is home to 10 other species of
lemur, several of which are also endangered due mainly to
habitat loss. The nocturnal
aye-aye has only been seen once at the park, although one old nest and traces of its feeding have been found at various elevations. Other mammals include at least 15 species of
tenrec, seven species of native
rodent, the
fossa (
Cryptoprocta ferox), and the
Madagascar sucker-footed bat (
Myzopoda aurita) The
reptile and
amphibian diversity at Marojejy is also rich, higher than any other protected area in Madagascar. A total of 148 species have been inventoried, and 17 of these are found only in Marojejy, including
Brookesia karchei and
Chamaeleo peyrieresi, two species of several
chameleons found there. The
panther chameleon (
Furcifer pardalis), leaf-tailed geckos (genus
Uroplatus), and many species of frogs are also reported from this locality. Invertebrates include large
millipedes,
spiders, and an abundance of small
leeches. ==Camps and accommodation==