Showing posts with label eagle. Show all posts
Showing posts with label eagle. Show all posts

Friday, 5 April 2013

BIRDS OF PREY



BALD EAGLE -  
Named because the 
white feathers made it look bald.
Birds of Prey were always admired for their majestic power and dashing skill. Kings used to hunt with falcons and eagles. It used to be a privileged sport for kings and royalties, for centuries.  Especially in the Middle East and Asia it was wide spread amongst the elite.

During the 19th century their hunting skills brought them in conflict with gamekeeper of sporting estates. During this time many birds were shot and the number of species was reduced.

Birds of Prey are a good indicator of the quality and quantity of surrounding animals. If the Birds of Prey are thriving all the animals right down the food chain are healthy and multiplying.

All flesh-eating Birds of Prey belong to the Falconifomes, apart from owls. Within these species are vultures, hawks, harriers, kites, eagles, falcons and caracaras.  There are 275 species world-wide. The osprey and secretary birds with their distinction have a separate
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Birds of Prey have mostly the distinguished features of hooked beaks and claws called talons. The talons are necessary for holding their prey or tearing the flesh.  Amongst these 275 species is a great variation from the huge sea eagles and harpy eagles which are capable of carrying off prey as big as a deer to the tiny insect-feeding falconets which are no bigger than a starling.

Most of the birds of prey are meat eaters but some also catch fish and eat them. Very unusual is the Honey-buzzards and secretive woodland birds. They can track down and dig out the nests of bees and wasps.  They will eat the larvae and adult insects as well as slurp out the honey.

HONEY BUZZARD


The African grasshopper buzzard-eagle follows fire on the Savannah. It catches the fleeing grasshoppers and insects.











BUZZARD EAGLE

Kites living in South America have a taste for snails.  Their talons hook out the snails from their housing.

The bat-hawk living in Africa a South-East Asia hunts bats in the evening light



BAT HAWKS



Migration
A magnificent sight for birdwatchers and scientists are various spots around the world where birds of prey gather for the annual migration. Especially scientists have the chance to tag hawks, eagles, falcons and vultures to collect data of their routes and life. Kites, honey buzzards and Eleanora’s falcons gather at the Bosporus Straits in Turkey.

Red-tailed, broad-winged and harp shinned hawks gather by the thousands at Hawk Mountain in Pennsylvania.

At Eilat in Israel the honey buzzards have their meeting places.

Over 300,000 birds of prey flying over the Isthmus of Panama every year.

Magnificent Eagles

Eagles will be always admired for their powerful built and majestic look. They are great hunters and fly over the wildest and remote parts on earth.


GOLDEN EAGLE


Golden Eagles live in the northern hemisphere in mountainous regions. It feeds on hares and medium sized mammals and birds. During the winter months it often feeds on carrion. It has great eyesight and can spot a prey from a long distance. It can often been watched flying high above the ground. When it spots a prey it swoops down and pounce it to the ground. Grouse starts flying when they spot an eagle.

SEA EAGLE

Sea Eagles are even larger than the golden eagle.  They are mostly solitary through the year. At the time when salmon are spawning in some in the Pacific Coast Rivers in the autumn the sea eagles are there in large numbers and feed on dying salmons.  Se eagles have huge hooked bills but in spite of it feed often on carrions. They use their great weapon of huge bills, talons and great strength to tear the carcass of dead animals apart. However, at courtship they display an incredible flight often upside down in the air gripping the talons of the bird above. The sea eagle is known for mating for life.

Eagles build large nest at the top of a tree or remote inaccessible crags.  They build their nest with large sticks and branches which they line with smaller sticks and grass.  The pair adds more material to the nest each year.  Older nests are large and reach over one metre in depth.  They can have up to three chicks but mostly the eldest chicks survives

HARPY EAGLE

South American harpy eagles are another species of the larger birds of prey. They measure up to 110cm from bill to tail. It flies and dives through the dense jungle canopy to catch monkeys, sloths and other animals with its enormous feet.



PHILIPPINE EAGLE





Philippine Eagles are another huge species and have the same hunting techniques. These beautiful birds have black and golden crest and deep bills.  They are hunting monkeys and flying lemurs. Today it is an endangered species and only a few hundred still exist in the wild. It is due to the loss of the habitat which is the rainforest.


Wednesday, 15 August 2012

CROWNED EAGLE



The bird was named Crowned Eagle because it raises a double crest on its head when it is alarmed or excited.  It gives a loud ‘kwee kwee' to warn any intruder.

The crowned eagle has huge feet with strong, sharp talons. The talons are a think as a human finger and has massive muscles. The crown eagle such equipped can kill a prey up to six times bigger than itself.

Birds of prey kill by catching the victim with its feet and slowly tighten the grip. This makes the talons go into the victims and the hind talon on the rear toe is longer and more fatal. They are like daggers going into the prey.  If the catch is not dead at once it will by the crashing power of their grip.

For the bird it is important that its prey is killed quickly. If it is not, it can lash out and injured the bird.

Birds of prey are catching mostly victims smaller than themselves to avoid injuries.  The crowned eagle has evolved power and skill to catch big animals. This ability gives the crowned eagle the advantage to attack animals such as monkeys.  A further advantage is there less competition and therefore hardly any food shortage. It also has to hunt less often and this reduces the risk of injuries.

HUNTING FOR FOOD
The crowned eagle hunts mostly in the early morning or late evening.  It hunts mostly in areas where monkeys are common.

Monkeys are not easily caught. They are in groups which give plenty of watchful eyes and they are agile and intelligent. They have a further protection from the canopy of leaves. Their disadvantage is that they are noisy and the eagle with it highly sensitive hearing can hearing them miles away. Some eagles fly high and swoop down onto their prey but the crowned eagle is a stealthy hunter and stalks its food.



The crowned eagle has the same ability as owls; it can fly without wing beats making a noise.  Most of the time it sits in the tree quietly watching and waiting for a prey to come a long. If it thinks it is useless it will fly to another tree and sits there again.  If it sees an animal trotting unaware under the tree it drops like a stone and kills it instantly.

It also uses other methods.  If it hears troops of monkeys it launches a surprise attack.  It will fly low under coverage of trees and foliage and gets as close as possible. It also could fly the long way around to use tenser foliage. Once it thinks it is close enough the eagle will fly below them. It uses the silhouette to pick the right victim.  It could be a monkey with the back to the eagle or one with a clear line of approach. At this moment the bird accelerates. The broad wings enable the bird to fly upwards quickly.  Its muscular legs swing forward resembles a mechanical grab. The feet strike the monkey, the talons driving deeper and deeper.  The strength of its wings drives the bird upwards and it looks like rocket. Still grasping its near-lifeless  victim.  It burst through the canopy and gets above the trees.



It is assumed that the crown eagle mate for life. They also use each other to distract the monkeys by one and the other catching it. After a successful hunt they share their prey. This is unusual for eagles.  If the victim is a big one they dismember the leftovers and wedge it into a tree and out of sight. Therefore, they always have a constant supply of food.

BREEDING
The pair has a territory with can be up to 16sqkm. They marked their boundaries by switchback swoops, souring climbs and at the same time giving high-pitched calls. This gives other crown eagle the message the territory is already occupied.

The crown eagle nest in big forest trees in a river valley. It is thought that many crown eagles used it for generation to rear their young. Every nesting season the adult bird adds more material and an ancient nest could measure 3m deep and 2m across.

Mostly the bird lays one egg but sometimes two. In this case the older chick will kill the younger one most of the time. The reason for this is that the chick needs its parent’s full attention to grow and survive.  After the young eagle left its nest the parents will feed it up to a year. During this time it will have to learn how to be a successful hunter.  Since they have to look after the chick for a full year it means that they can only breed every other year.

The chick only grows its adult plumage when it is 15 months old. Till such time it’s feathers have a much paler colour and a white crest.


It takes great skill to hunt and kill and the young eagle will go through a lean period. The hunger will drive it to take risk and this will lead to injuries or death.

HABITAT
The crown eagle is relying on forests for its habitat and hunting.  It wasn’t  so long ago the crowned eagle was seen from Africa south of the Sahara desert,  from Guinea in west Africa to Kenya in the east, and south to the coast of Cape Province.  However, as it is always the same story the habitat is constantly reduced and not only the eagle loses its territory but also the prey.