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Email
this page to a friend Africa Travel Newsletters > Africa Bird's of
Prey
1. Africa's Birds of Prey
As birding
increasingly becomes one of the
fastest growing hobbies in the world,
advances in technology continue to make this hobby more fun and
appealing. It is now easier with powerful
binoculars and other optical
instruments to view birds from a distance. Africa is the most rewarding
birding destination in the world. The continent
has close to 2,500
recorded bird species, about two-thirds of which are endemic to the
continent. Both Kenya safaris
and South Africa safaris offer a rewarding birdwatching experience.
Africa's
birds are found in all sorts of ranges -from
grasslands, marshlands,
forests and mountains, to water-shores, woodlands, arid interiors, and
lowlands. The Indian Ocean islands, including
Madagascar, Mauritius and
Seychelles are also abundant with bird-life. Here you have superb
opportunities to see extremely rare and endangered species
with over
140 species endemic to the islands.
Raptors- birds of prey- are
the princes of the bird world. They are charismatic and are among
the
most fascinating birds to watch. Raptors fly faster, further, higher
and more elegantly than other bird species. They are feared and
despised by
other birds and indeed by many other animals- particularly
those that they prey upon. Raptors are perched right at the top of the
food chain, and are
good indicators of a habitats environmental health.
Worldwide
there are about 500 species of birds of prey. The family of raptors
includes:
eagles, hawks, kites, falcons, vultures, buzzards, harriers,
owls, and the secretary bird. All except the owl -which is nocturnal,
are diurnal -meaning
they are active by day. These birds are different
in many ways; yet share many common features.
Birds of prey have
powerful, sharp and hook-shaped beaks that are designed for tearing of
flesh. Their beaks comprise of two horny keratin plates that are hooked
at the tips to suit their feeding
habits. Raptors generally have sturdy
legs, spiked with exceptionally strong and non-retractable claws called
talons, which they use for attack and
grip. This is no doubt where
their greatest physical strength lies.
In addition, they have
purposely built spindle-shaped bodies, enabling
them to be nimble and
sprightly fliers. The aerodynamics of wing size and tail shape
determines each species' hunting strategy. These attributes
are
complemented with perfect vision and an acute sense of hearing, to make
raptors lethal flying machines.
Vision is a raptors
most
important sense. They see in colour with vision acuity up to 3 times
that of humans and focus well using telescopic vision. Their eyes
are
proportionately large, with more eye sensory cells than other animals.
They have a third eyelid beneath the lower eyelid -a thin clear
membrane
that can expand horizontally across the eyeball. They thus can
close the extra eyelid to protect the eye without loss of vision or
focus.
Raptors
have
inconspicuous external ears at the lower back of the eyes and
their hearing is sensitive. They have a less sensitive sense of smell
but an acute sense
of taste that basically guides them to avoid harmful
feed. Lacking the gift for music, their vocalizations are anything but
melodic; their cries are
sometimes shrill calls, fierce screeches,
sharp whistles, guttural squawks and hair-raising hoots.
Raptors
generally wear ashen coloured gowns
with hues ranging between black,
brown, white and greyish-blue. Colour is rarely a distinction between
males and females but rather between the young
and adults. Mating and
breeding for these birds is seasonal. Most species are monogamous, and
both mates are adept at incubating the eggs, brooding and
parenting.
Among most raptors, females are larger and heavier than males- a
phenomenon referred to in scientists jargon as reverse
dimorphism.
Females
normally pick the warmer months when temperatures are just right to lay
eggs. Hatching is a process that may take days;
one egg at a time. The
hatchlings break out of their shells using an "egg-tooth", which falls
off shortly after hatching. The raptors little
ones are featherless and
largely helpless. The mother broods her nestlings as her mate is
constantly away hunting for the young ones who seem to be in
a
recurrent feeding frenzy.
The parents typically care for the
nestlings until they are fully fledged. This may last for about 2-3
weeks
for the smaller raptors, 5-10 weeks for the mid-sized and several
months for the larger eagles and vultures. Young adults will normally
leave the nest
on their own, or when the parents discontinue their food
supply, or sometimes when they leave to migrate.
Migration is a
seasonal movement,
usually between north and south, based on an
internal calendar triggered by climatic and other environmental
factors. The birds are able to re-trace
their paths guided by dynamics
such as: scenery, past journeys taken and the earth's position in
relation to the sun, moon and stars.
Raptors
are not
particularly social, and may choose to migrate solo or in small flocks;
they are therefore not true migrators. They are territorial and
home
ranges - which vary between species, are based on availability of prey.
The
diet of the birds of prey heavily contains flesh and
generally
comprises insects, snakes and reptiles, fish and clams, eggs and birds,
small mammals, and carrion -depending on species' taste and
preference.
Though hunting methods vary with species and type of prey hunted, they
are based on the principle of high-speed ambush.
Most
raptors hunt by
coordinating their body muscles and a number of senses,
all calculated into a timely reflex. They are able to spot prey from
miles away and can detect
slight movements with their super vision. In
a very high-speed stoop dive, they approach their prey and within a
split second on contact, they incise
their powerful talons into the
unfortunate prey.
The synchrony of spiny claws and muscle power
squeezes the life out of the victim. They then
begin to rip off the
flesh with their hooked bills, consuming all that is edible. Raptors'
table etiquette allows feeding while still in mid-air
flight.
Eagles
-which are quite large in size, are the most common of the raptors.
There are 59 eagle species in the world, classified into 4
major
categories: booted eagles, fish eagles, snake eagles and forest eagles.
Eagles have long, broad wings best suited for wind gliding and
soaring.
They are known for the dramatic way in which they hunt; they grab their
prey in a dash and fly off.
Eagles specialise in hunting
small
and medium-sized mammals, including mice, rats, rabbits, monkeys and
even small antelopes. They build their nests high among tall trees
or
high crags. Their nests -made of sticks -are usually large, sometimes
weighing close to 100 kg with a diameter of over 3m. They
live
significantly long, varying with size and species- and larger eagles
are known to live 40-55 years.
From ancient times, the eagle
has
been a symbol of power and governance. Even today, it is one of the
most common symbols on emblems, and is the national bird of
numerous
countries. In ancient Egypt, the eagle symbol was the seal of the
Ptolemaic leaders. Today, the eagle -the bald eagle in particular, is
the
official American national symbol.
Booted eagles are mainly
found in southern and eastern Europe and some northern parts of Africa
and migrate
south to sub-Saharan Africa during winter. They prefer the
forested, undulating countryside and open savannah where their shrill
vocalization is
occasionally heard. Relative to other eagle species,
they are smaller in size but still considerably larger than other
raptors, with an approximate
wingspan of 130 cm at full-grown length.
Booted
eagles have wholly feathered legs and live on birds, small mammals and
reptiles. They breed
between April and July, laying 1-2 eggs per
season. They have a lifespan of up to 12 years.
Fish eagles prey
on fish and clams and necessarily
live around water shores and coastal
areas. The common species widely seen in Africa south of the Sahara is
the African Fish Eagle. Fish eagles are
specialised fish-eaters and are
usually about 2ft from bill to tail-tip. Equipped with strong barbed
talons, they can easily clutch slippery prey. They
usually have
white-feathered heads, short tails and narrow wings with a span of up
to 5.5ft outstretched.
Fish eagles have remarkable sight
and can
see well through water. They dive feet first, at high speed to grapple
their aquatic prey with a perfect calculated plunge that
outsmarts
water refraction. They breed around fresh shores and practice strict
fidelity to their mates.
Snake Eagles -like their name
suggests,
prey on serpents though sometimes they take on lizards and small
mammals. Widespread throughout out the continent, they are mainly
African
species and hang out in arid savannahs and tropical forests.
Their short, featherless legs are studded with tiny talons. Common
types include: short-toed eagle, black-chested snake-eagle, brown
snake-eagle, banded snake-eagle and the fasciated snake-eagle.
Falcons
look more like eagles but
have narrower wings, well suited for high
speed flying since they prey hastily. They are the fastest animals in
the world, and can attain speeds of up
to 150 km/h. Falcons are
spectacular hunters and mostly prey on live birds, which they prefer to
catch in mid air. They use their powerful legs to
strike and
destabilize a bird in flight then move speedily to grasp it before it
falls to the ground.
The falcon's kicks are deadly, though
their
talons are not as lethal as those of the eagle. Their diet also
includes smaller mammals and reptiles. They mostly come to Africa just
to
breed. The pygmy falcon is the smallest of the raptors, weighing
less than 60 g; it feeds on insects, tiny reptiles and mammals. It is
light coloured
on the underside and darker on the upper and wing sides.
It is mainly resident in east and southern Africa.
Help and More Information for Eastern and Southern Africa!
Planning for a birdwatching safari in East Africa or Southern Africa? Contact
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today and we will assist you in picking and booking the best hotel and
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