Aye Aye Classification and Evolution
The Aye Aye is a species of
Lemur that is found inhabiting the
rainforests of Madagascar. The Aye Aye is not only the largest
nocturnal
primate in the world but is also one of the most unique and is in fact
so strange in appearance, that it was thought to be a large species of
Squirrel when it was first discovered. In the mid 1800s the Aye Aye was finally recognized as being a species of
Lemur but was classified in a group of it's own as their closest
Lemur relatives remain a mystery even today. However, these incredibly unique
animals are severely threatened throughout much of their natural
habitat
and were thought to be on the brink of extinction by 1980, primarily
due to them being killed instantly by local people who believe that
seeing an Aye Aye is very bad luck. Although today population numbers
seem to have risen, the Aye Aye is one of Madagascar's most endangered
animal species.
Aye Aye Anatomy and Appearance
The Aye Aye is a primate that is most closely related to
Lemurs but is one of the most unique
animals
on the planet due the fact that it possesses a number of very distinct
adaptations. Their body and long tail are covered in coarse, shaggy
black or dark brown fur with a layer of white guard hairs that helps
them to blend into the surrounding forest in the dark. The Aye Aye has
very large eyes on it's pointed face, a pink nose and rodent-like teeth
with incisors that grow continuously to ensure that they never become
blunt. Their large rounded ears are incredibly sensitive giving the Aye
Aye excellent hearing when listening for grubs beneath the tree bark and
are able to be rotated independently. The Aye Aye has long and bony
fingers with sharp pointed claws on the ends to help when dangling from
branches, but it is the middle fingers on their front feet which are
their most distinctive feature. Much longer than the others, these
fingers are opposable with a double-jointed tip and a hooked claw on the
end and are used for both detecting grubs in dead wood and then
extracting them.
Aye Aye Distribution and Habitat
Historically, the Aye Aye inhabited the coastal forests of eastern and
north-western Madagascar but by 1983 they were thought to be almost
extinct with only a few scattered individuals known to still be found
there. Since then their population numbers have increased and although
these populations aren't favourably big, they are found in an increasing
number of locations and in a variety of different forest
habitats. The Aye Aye prefers dense, tropical and coastal
rainforest
where there is plenty of cover but they are also known to inhabit
secondary forest, bamboo thickets, mangroves and even coconut groves
along the eastern coast of Madagascar. However, along with the
persecution of the Aye Aye by local people they are severely threatened
in their natural environment by
habitat loss.
Aye Aye Behaviour and Lifestyle
The Aye Aye is a
nocturnal and arboreal
animal
meaning that it spends most of it's life high in the trees. Although
they are known to come down to the ground on occasion, Aye Ayes sleep,
eat, travel and mate in the trees and are most commonly found close to
the canopy where there is plenty of cover from the dense foliage. During
the day Aye Ayes sleep in spherical nests in the forks of tree branches
that are constructed out of leaves, branches and vines before emerging
after dark to begin their hunt for food. The Aye Aye is a solitary
animal
that marks it's large home range with scent with the smaller territory
of a female often overlapping those of at least a couple of males. Male
Aye Ayes tend to share their territories with other males and are even
known to share the same nests (although not at the same time), and can
seemingly tolerate each other until they hear the call of a female that
is looking for a mate.
Aye Aye Reproduction and Life Cycles
It was previously thought that the Aye Aye had a very strict breeding
season (in the same way as other Lemurs) when they actually seem to
breed throughout the year, depending on the when the female comes into
season. When a female is ready to mate she calls to male
Lemurs
who are known to gather around her and will fight aggressively between
one another for breeding rights. After a gestation period that lasts for
about five months, a single infant is born and spends it's first two
months in the safety of the nest, not being weaned until it is at least 7
months old. Young Aye Ayes will remain with their mother until they are
two years old and leave to establish a territory of their own. A female
Aye Aye is thought to be able to start reproducing when she is between 3
and 3.5 years old where males seems to be able to do so at least 6
months earlier.
Aye Aye Diet and Prey
The Aye Aye is an omnivorous
animal that feeds on both other
animals
and plant matter, moving about high up in the trees and under the cover
of night. Males are known to cover distances of up to 4km a night in
their search for food, feeding on a variety of fruits, seeds,
insects
and nectar. They are however specially adapted to hunt in a very unique
way as they use their elongated middle finger to tap dead wood in
search of the hollow tunnels created by wood-boring grubs, listening for
even the slightest sound with their sensitive bat-like ears. Once the
Aye Aye has detected it's
prey
it uses it's sharp front teeth to gnaw a hole into the wood before
inserting the long middle finger, hooking the grub with it's claw and
extracting it (filling the same ecological niche as a Woodpecker). The
Aye Aye is also known to use this long digit to eat eggs and coconut
flesh and is thought to be the only primate to use echolocation when
searching for food.
Aye Aye Predators and Threats
The secretive and tree-dwelling lifestyle of the Aye Aye means that it actually has very few natural
predators in it's native environment, with the agile and equally
nocturnal Fossa being their most ferocious natural
predator (along with
Birds of
Prey and
Snakes that hunt the smaller and more vulnerable young).
Humans
are in fact the biggest threat to the Aye Aye as populations have been
obliterated in much of their native forests due to superstition from
local people who believe that it is a bad omen to see one. In other
areas where they are not feared in this way, the Aye Aye is hunted as
bushmeat. The biggest threat however to current populations is
habitat loss caused both by deforestation and growing
Human settlements that encroach on the Aye Aye's natural
habitat.
Aye Aye Interesting Facts and Features
Although the Aye Aye is a solitary
animal,
males have very loose territories that can overlap those of a number of
others. They build their nests high in the trees and will rarely sleep
in the same one two nights in a row which means that one territory can
contain numerous nests, with up to six thought to be found in just one
tree. The Aye Aye is thought to be one of the creepiest creatures in the
world with it's name believed to have come from the cry of alarm when a
person spotted one. Despite now being found in more areas of it's once
vast range, Aye Aye population numbers were once so low that they were
actually thought to be extinct in the wild until 1957 when they were
rediscovered.
Aye Aye Conservation Status and Life Today
Today, the Aye Aye is listed by the IUCN as an
animal
that is Endangered meaning that it is severely threatened from possible
extinction in the near future. Numbers have increased somewhat since
the 1980s and small populations have been sighted in more areas of their
natural range however, they are still greatly threatened by the
Human
activity going on around them. A number of captive populations can be
found around the world in breeding programs to try and save the Aye Aye
from complete extinction. A small population can also be found on the
island of Nosy Mangabe, which is a protected reserve just off
Madagascar's north-east coast.