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| Local
Fauna and Flora in the Diani Area and at the Colobus Cottage |
Primates
aren't the only thing to see on the south coast of Kenya.
The region offers a great array of mammals and birds, reptiles,
marine life and flora for exploration. Here are some of the
different things you can see in the forest at the Colobus Cottage
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| Mammals |
Zanj
Elephant Shrew (Rhynchocyon petersi) This
unique shrew eats invertebrates (particularly ants) found in leaf
litter and has been declared rare by the IUCN. It is about
the size of a rat and has a long tapering snout which gives it its
namesake. It has a pungent smell which derives from a gland behind
the anus. Not much is known about these shrews,
although they are living in the forests in Diani.
Suni
(Neotragus
moschatus) Suni are small forest antelope only 40cm tall
although the male's horns can reach 13cm. Their facial
glands are enormous, especially in the male, and they have a
strong body odour which demarcates territory and identifies sex
and status but may also act as insect repellant. They are
browsers with a varied diet of leaves, shoots and herbs, and they
gather under feeding colobus monkeys to pick up dropped leaves and
shoots of brittlewood. They rely on smell, and visible and
invisible scented pathways are followed with individual and
communal dung middens on the peripheries of a territory.
They feed in short bursts interspersed with rests and are most
active after rainstorms and around dusk and dawn. They rest
during the heat of the day. They live mainly in monogamous
pairs on territories of approximately 3 ha
Mongooses
(Herpestidae) These primarily terrestrial
predators eat invertebrates, small vertebrates and sometimes
fruit. Most species are water dependant inhabitants of
forests, woodlands, savannahs and marshes; however, some can go
long periods without water. They depend on scent to
communicate and mark territories. Anal secretions constitute
long-lasting, individual signatures while cheek-gland secretions
produce a short term status related signal that can trigger
immediate aggression. Their ability to roll and crash/crack
eggs and to kill dangerous snakes is well known. Both are
instances of the manipulative skills, speed and versatility of
many mongooses in their hunting techniques. Mongooses likely
to be seen in Diani are the Egyptian mongoose, slender mongoose,
white-tailed mongoose and bushy tailed mongoose.
Genets
and Civets (Viverrinae)
Genets
and civets are to carnivores what lemurs are to the higher
primates. Civets, in particular, are modern approximations of all
carnivores’ common ancestral stock. These carnivores are
generally solitary foragers, spanning most major habitats.
Scent is their most fundamental mode of communication, and all
species use glandular secretions to regulate contacts and
behaviour. They are almost entirely terrestrial, solitary foragers
and not endangered.
Genets (Genetta) have
slender, long, cat-like bodies and cat-like semi retractable
claws. They have soft, spotted or blotched fur (occasional black
morphs are also known) with banded tails. These nocturnal
animals are normally silent although they spit, hiss, growl, purr
and meow like cats. They are omnivorous (eating vertebrates,
invertebrates and plant matter) and rely on speed and agility and
cryptic colouring to catch food as well as evade large
predators. They are solitary except for brief
courtships. In Diani we have the common genet - with a crest
of long fur along the spine, a ringed tail and small, numerous,
linear dark spots on a sandy background. They eat
rodents as their main staple. Also seen often is the
blotched genet, which has a blotchy coat. They eat
rodents, invertebrates and fruits.
African
civet (Civettictis civetta) is
the only civet to be found in this area. These dog-like
animals make very conspicuous dung middens called civetries.
They are largely terrestrial and normally silent, although they
growl very deeply if harassed. They are omnivores adapted to
eating poisonous fruits, such as Strychnos, insects,
millipedes and dangerous snakes. They are able to feed irregularly
and even fast for two weeks at a time. They have up to four
young born 60-72 days after mating which are born in a burrow,
crevice or dense vegetation. Civet secretions are so copious and
durable that they once provided the perfume trade with a valuable
fixative for floral scents.
Bats
There are two types of bats in
Diani -- insect eaters (insectivores) and fruit eaters (frugivores).
In spite of the similarities between fruit and insect eating bats
which suggests a very ancient common ancestry, fruit bats actual
have more affinities with primates. Possibly they evolved from
lemur-like gliders.
Insectivores use
echo-location to pinpoint obstacles and prey. Species whose niche
is under the canopy utilise higher frequencies and therefore have
greater precision. Those that are in open areas use lower
frequencies as they require lower precision. Insect eating bats
have clawless wings, complex teeth, small eyes and complex ears
with irregular margins.
Frugivores do
not use echolocation and are mediocre navigators and usually fly
above the forest canopy. They have large eyes, claws on their
wings, funnel-shaped ears, large tongues, blunt short teeth and
deeply ridged palates which while working together, crush and
squeeze the fruit so that only juice and pulp are swallowed.
Fibres and rind are usually spat out. They rely on a year-long
supply of fruits and flowers. They can be important as pollinators
and are very Important as seed dispersers
African Hedgehogs (Atelerix)
The evolution of spiny armour has been a major factor in these
hedgehogs’ survival as a group. They are successful and
widespread modern survivors of a very ancient group. The spines
are embedded into a muscle that is anchored to the forehead which
contracts and becomes a bag into which the body, head and legs are
withdrawn. The spines are effective protection though some owls
and other carnivores have no problem killing and eating them.
These nocturnal insect-eaters trot with fast leg movements but
hunch or roll into prickly balls at any disturbance. They find
prey by scent and sound.
Bush
pigs (Potamochoerus
larvatus) Bush pigs range across Kenya up to 4000 metres
on Mt. Kilimanjaro and live in forest and woodland habitats. They
are omnivorous - eating roots, tubers, bulbs, fruits, larvae,
beetles, snails, amphibians and reptiles. One group of them
has even been seen to drive a leopard off its kill! Their home
ranges are about 10km 2, while nightly they forage up to 6
km2. They are a major pest for farmers and are hunted for
control and meat. Without natural predators, they can become very
abundant as they have short gestation periods (120 days), large
litters, and fast maturation rates.
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| Insects |
Butterflies
There is an array of brightly coloured butterflies found in
the area. Of these, the Didem (Hypolimnas chrysippus)
is of particular interest as the males are dark blue with large
white spots, while the females are bright orange, mimicking
another species of butterfly (similar in colouring to monarchs)
called the African queen (Danaus chrysippus) which has a
foul taste and so is safe from predators. Other species
include the golden, violet/ blue, and black coloured Gold Banded
Foresters (Euphaedra neophron) and a number of charaxes and
swallowtails including the striking narrow banded swallowtail.
Coastal giant millipede (Archispirostreptus
gigas) This is the
largest of the giant millipedes reaching over 10cm. They
can cause serious localized seasonal damage to crops and
small forestry seedlings. In dry conditions, they feed on
living plants and burrow down in crevices; while in wet
conditions, their populations appear to increase explosively.
They mainly feed on leaf litter and other dead
materials. The species Epibolus pulchripes is more
common on the coast. It seldom damages plants but is very
useful in humus formation. Predators to the giant millipedes
include civets, mongoose, and some birds. |
| Birds |
Owls
Their eyes can see in dim
light (but not in total darkness), and they have the best hearing
of all birds. They eat mice, rats and large insects
Owl eyes face forward so that they can focus on their fast-moving
prey and judge distances. They have large ear openings, protected
by feathers, to hear their prey. Local species include the barn
owl, white-faced scops-owl, pearl-spotted owlet, African barred
owlet, and spotted eagle-owl.
Silvery-Cheeked Hornbill (Ceratogymna cylindricus) This
striking, large bird is at home in Diani and forests, parks and
gardens along the Kenyan South Coast and as far as Nairobi.
It is distinguishable by its large casque which is an extension of
its upper beak. It has a far-carrying and raucous call, but
can also utter soft clucks, bleats and grunts. Wingspans can
be over 75 cm in the males and 65 cm in the females. |
| Trees |
| Strangler
figs (Ficus
lingua) Strangler figs are plants known as
epiphytes (plants that start by growing on other plants).
Researchers have postulated that this epiphytic habit is an
adaptation to avoid fire and being foraged on by herbivores. Fig
trees are not parasitic; they only get physical support from the
host plant. Once the seedling high up in the host tree takes
root, it sends its roots downwards until they reach the ground
where they dig in and start growing aggressively. It has
been reported that they do not get any nutrients out of their host
plants directly, but rather they compete for the same water, light
and nutrients of the host tree. The strangler fig eventually
kills its host through this competition as it has a stronger
sucking force to draw in water than other trees
Baobab
(Adansonia digitata) Truly a tree that represents
Africa, this striking deciduous tree of immense girth grows up to
25 meters in height. It is bare of leaves up to 9 months of the
year, leaving immense bare branches, earning the baobab the
nick-name “the upside down tree”. Despite its soft, pithy
wood, it is one of the longest lived trees in the world. Carbon
dating has shown trees 5m wide to be 1000 years old and the
largest to be about 3000 years old. Portuguese cannon balls
from nearly four centuries ago have been found embedded in living
trees that line the approach to Mombasa harbour.
The bark is grey, smooth and fibrous, often pock-marked and
heavily folded. Leaves are compound, ‘digitate’, dark green
and shiny. The solitary flowers have 5 waxy petals surrounding a
ball of fine stamens; they hang upside down on hanging stalks and
are unpleasantly scented. Fruits are large, hard-shelled capsules
up to 24 cm long which remain on the tree after ripening.
Their leaves are a favourite of the colobus, and their fruit is
eaten by other monkeys, though only the baboon can crack them open
once they’re full grown.
Prickly Ash (Zanthozylum chalybeum) This
is an indigenous, evergreen shrub or tree 1.5 to 10 meters or
more. It is found often in rocky sites (like the Diani
forests which are on coral rock). Its trunk is furrowed with corky
knobs or ridges crowned with spines. Leaves are compounded
with 5 to 11 leaflets. Its flowers are yellow-green and are
usually borne below the leaves. The fruit is tiny, only 5 – 8 mm
long. It is used locally to treat chest infections and sore
throats and to induce vomiting. A bark infusion is given to
sick camels. Because of its fresh citrus smell and taste, it’s
also used to spice tea. The leaves are eaten by colobus.
Neem
Tree (Azadracta indica) This
tree is common on the coast, though it is not indigenous to
Africa. It is a hardy tree which grows up to 118 meters. It has a
rough, pale brown-grey bark, small, glossy-green compounded
leaves, small white or cream-coloured fragrant flowers and small
oval, greenish-yellow berries. It is widely planted on the
coast for fuel, timber, shade, agroforestry in exhausted soils,
and as traditional medicine for treating 40 diseases, including
malaria. It is also used for soap making. Colobus like to
eat its leaves while its berries are a favourite for sykes and
vervets.
Flamboyant (Delonix regia) Another
exotic plant found in Diani and a favourite of the colobus
monkeys. It is one of the most beautiful trees, particularly when
it flowers; each brilliant scarlet-red flower reaches up to 10cm
across with wavy petals, of which the uppermost is creamy white
and splashed with scarlet. It has a flat or umbrella shaped
crown; its bark is grey and smooth; its leaves are light
green and feathery, with leaflets mostly less than 1 cm long. The
fruits are long, brown, heavy pods honeycombed into horizontal
seed chambers. These seed pods are also favoured by baboons
and sykes. Vervets also eat them.
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