Black Eagle up-date Aug 2013

Faithful Black Eagles continue to breed

Photo by Garth Heydenrych 

At the Walter Sisulu botanical gardens in Roodepoort (Gauteng, South Africa) the female Black Eagle (Verreaux's eagle - Aquila verreauxii), called Emoyeni, laid two eggs on 15 and 19 April 2013. The eagle pair were sighted collecting twigs and leaves to prepare their nest for the expected brood. Emoyeni has bred annually over the past 30 years with the exception of a few odd years. Only the past 30 years are counted since the establishment of the Garden, but some sources claim that these eagles have been residing in this area for more than 40 years.

Usually around February, the eagle pair mate and groom each other whilst tending and preparing their nest. After a 45 to 60 day incubation period two chicks hatch, but only one is likely to make it to adulthood. The other may not even hatch, but if it does, the older chick that hatched first, will poke its younger sibling to death. This is known as the Cain and Abel struggle and it all happens in the presence of the parents who seem to tolerate this behaviour.

(Photo Lian van den Heever) 

In July 2013 however, there was no sign of the old eggs on the nest, and some mating behaviour was observed.

Picture G. Heydenrych 

Then, on the 17th August 2013, an egg was spotted in the nest with the second one following on the 19th August. Hopefully now, after a 45 to 60 day incubation period, two chicks will hatch, ensuring another future generation of Black Eagles.

19th August 2013 - two eggs in the nest 

Although this is good news, the hot summer weather can pose a challenge because breeding usually takes place in winter with the eggs hatching in mid-May. The latest batch of eggs, after a 45-day incubation period, will only hatch at the beginning of October, which is mid-summer here in South Africa. But these birds are very adaptable and all this will not hinder them from producing another generation in summer.

The Black Eagles can be viewed from a live feed web link from the wildlife multilink platform of Black Eagle Webcam that documents a multitude of animals through live video.

(Info from Walter Sisulu Botanical Gardens Newsletter)

 

Screenshot from Wikipedia

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Bond between chick and parent does not last

Black Eagle juvenile - Jabulani

Unlike in human beings, where many families share a lifetime of existence together, bonds between parents and offspring only last a for few months for many animals.     

Verreaux's eagles (black eagles) are no exception. The juvenile that hatched a few months ago at the Walter Sisulu botanical Gardens in Gauteng, South Africa, jealously guarded and fed by its parents, will soon be chased away forever to start a life of its own. The eaglet, dubbed Jabulani, enjoyed all the protection it needed to make it in life. It even had the dubious privilege of killing and eating its own sibling with the ‘approval' of its parents. After several months of learning how to fly and hunt, along with other survival skills, Jabulani's future now depends on her wings. 

She took her maiden flight on 13 September 2012 and has been seen taking plunges on some of the canopies. Although she has not yet mastered the art of hunting, all the other features she need have now fell in place - a sharp beak, strong feet with claws as sharp as daggers and wings that will give her total control of the skyline. Her parents will soon chase her out of their Garden territory and she will have to fly away to establish her own territory until she meets a suitable mate who, like her parents, is likely to become a lifetime partner.             

For now, her main concerns will be to learn and perfect hunting skills, and gain weight that will be needed for her battles ahead. Verreaux's eagles are capable of eating any small to medium-sized animals and typical prey includes guinea fowl, francolins and dassies (rock hyrax). 

Photograph: G. Heydenrych  

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Black Eagle chicks in the midst of a Cain and Abel struggle

Two eggs were laid by the Walter Sisulu Botanical Garden’s resident Black Eagle pair during May 2012. The eggs hatched in early June after an incubation period of 44 to 45 days and two chicks emerged four to five days apart. 

The sad reality is that only a single chick will grow to adulthood. The reason for this being a phenomena called Cainism (or in other words a Cain and Abel struggle) whereby the stronger of the two chicks (usually the oldest (Cain), attacks and eventually kills and devours its sibling (Abel) after a 3 to 4 day struggle. The first chick, being the older and the stronger, will intercept the food offered by the female. The male provides most of the food while the chick is in the nest while the female feeds the young chick during the early stages and also defends the nest. The chick will grow into a handsome golden/brown juvenile eaglet. 

The gardens are situated in Roodepoort (Gauteng, South Africa) and fifteen eagle-generations have passed since the Black eagles (Verreaux’s eagles) were discovered in the Garden - I have been following the life of these two Black Eagles (Verreaux’s (Black) Eagles) for many years. Over the past 30 years Emoyeni, the female, has produced a chick every second year or even annually at times. In Nov 2011, Mbuso, their last juvenile Black Eagle chick, left the Garden to establish his own territory.

 Mbuso

The Black Eagles on their nest

The webcam focusing on the nest

The male circling the nest

For more interesting info visit the website or view the eagles via webcam or alternatively view them on TV at the Garden entrance.

PS : You can read all the Black Eagle articles in the menu on the left - they are all coloured RED

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Another breeding season starts

Another breeding season starts for the faithful Black (Vereaux’s) Eagles 

 

Fifteen eagle-generations have passed since the Black eagles (Verreaux’s eagles) were discovered in the Garden and they are again faithfully preparing their nest for another generation to come. According to some sources the Black eagles are thought to have occupied the Waterfall for over 40 years, long before the Garden was established. 

Over the past 30 years Emoyeni, the female, has produced a chick every second year or even annually at times. 

 Mating usually takes place after nest building has been in progress for some time and is not a certain sign that the female will lay, or that nest building will proceed to the eggcup stage. Mating occurs often after both birds have fed and can occur many times in one day. Laying occurs towards the end of April or early May, if the female is spending long periods of time on the nest. Two eggs are usually laid 4 days apart. After an incubation period of 44 to 45 days, the eggs hatch, but only one chick is likely to make it to adulthood. 

The Black Eagle is one of Africa’s largest and most spectacular eagles. It is big and powerful with a wingspan that measures more than two meters. This enables them to fly at high altitudes without flapping their wings, thus saving them energy. A breeding pair remains faithful to one another for as long as they live. 

(Info from the Botanical Gardens Newsletter - May 2012)

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Verreaux’s (Black) Eagles family expands

Have you ever felt the thrill and absolute awe of watching a black eagle catching thermals – one minute savouring the currents on its 2.3 meter wingspan, the next minute with wings folded arrow like it plummets downwards - lost momentarily in swirling cloud – it appears again resolute and intent as it nears the earth – you wonder if it will be able to stop before it hits the ground - and to your amazement its large wings stretch out and it hurtles back up into the sky! It is a totally breathtaking sight, as the eagle climbs higher and higher - until it is not visible with the naked eye - and all of this in just a few minutes.

This is the world of the ‘Black Eagles of Roodekrans.’ Weighing up to 4.8 kg this is one of Africa’s largest and most spectacular eagles. - These are certainly the masters of the sky!



The Verreaux’s (Black) Eagles have laid two eggs following the preparations for the nesting season that started at the end of February 2010. During the nesting season both male and female refurbish their nest with sticks and leafy sprays.

The eagles laid their 1st egg on 9th April 2010 and the second one on 12th April.
Both Eagles take turns in incubating the eggs – one will stay on the nest while the other goes hunting. The eggs are expected to hatch after 45 days incubation. Two fluffy white eaglets will emerge from the eggs four days apart. Black eagles are birds of prey that hunt other animals for their food.

These birds can be viewed at the Botanical Garden (Walter Sisulu Botanical Gardens, Malcolm Road, Poortview, Roodepoort, Gauteng, South Africa) in their natural world as they hover above the property or can be viewed through a webcam connected to a TV set at the Visitor Centre at the entrance to the Botanical Garden.

Visit www.blackeagles.co.za for more info and a map on how to get there.

GPS - X: 27°50`42`` Y:-26°5`15``


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