The Raptor

January 2020 – The Raptor

In line with current eco-trends and aiming for a ‘greener’ lifestyle The Raptor is an e-newsletter – it does not conform to traditional page sizes and is not designed to be printed. The Raptor is what YOU make it so please do keep sending all the sightings and information through.

In this Issue

Getting to know the raptors

Look out for these on the estate

Cryptic Colouration 

Wahlberg’s Eagle

Daily distractions

Observations from our residents

Great results from our photographers

Road Names in Raptor's View - Derek Solomon

Following on from the last issue the next road is Pygmy Falcon. An interesting choice as it is a bird of the semi-arid regions in the Kalahari in the west of the country and it is unlikely that it will seen here although there is apparently a record from northern Kruger, possibly a stray from the East African population.

Its scientific name is Polihierax semitorquatus polios (Greek) – pale grey; hierax (Greek) – falcon semi (Latin) half; torquatus (Latin) collared.

Raptor's View

This little raptor is the smallest diurnal bird of prey in southern Africa, only the size of a shrike. The male is a very striking bird with dove-grey upperparts and white underparts. The black tail has rows of white spots. The female has a dark chestnut back, but otherwise is similar to the male.

While common in Namibia, the Kalahari is probably the best place to find it. What is particularly interesting is its association with the massive communal nests of the Sociable Weaver, making its nest in one of the cavities made by a weaver. Although it sometimes preys on Sociable Weavers, particularly nestlings, its main prey is reptiles and insects and predation of weavers is regarded as minimal.

Scrambling Plants - Dave & Bernie Spencer

Scrambling plants make up a diverse and fascinating component of Raptor’ s View flora. Here are four to look for out and about on the estate.

Raptor's View

Cissus cornifolia, Ivy Grape or Valsdruif is widespread on RV. A member of the Grape Family, Vitaceae, it grows as a free standing shrub or trailing over other plants and rocks. The edible fruits are purple or black when ripe.

Raptor's View

Rhoicissus tridentata, Bushmans’s Grape or Boesmansdruif is another fairly common member of the Grape Family. As the species name suggests the leaves are toothed. Considerable variation is seen in specimens from different locations and this plant has several medicinal uses.

Raptor's View

Our third climber Ipomoea obscura, Wild Petunia or Wilde Patat has attractive yellow flowers and heart shaped leaves. The flowers are short lived and typical of the Morning Glory (Convolvulaceae) Family

Raptor's View

Pergularia daemia, Trellis Vine or Bobbejaankambro is a fast growing member of the Oleander (Apocynaceae) Family. This plant has unusual long stemmed flowers and fruits resembling paired horns which split open to disperse seeds with silky fibres.

Camouflage or cryptic colouration - Derek Solomon

This is a defence mechanism or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings and protect themselves against predators. Cryptic coloration is especially common in small animals such as insects, lizards, snakes, and frogs as well as several species of birds. These animals are often the same colour as the leaves or twigs on which they rest. Some insects even look like the twigs or leaves themselves but this only works if the animal is resting on the appropriate background and usually only when the animal isn’t moving. When out walking on the estate take a little time to look amongst the leaves or branches or in the leaf litter on the ground to see what creatures are living there.

Raptor's View

Stick Insect

Raptor's View

Painted Reed Frog

Raptor's View

Spotted Thick-knee

Raptor's View

Foam Nest Frog

Raptor's View

Scops Owl

Raptor's View

Grasshopper

Wahlberg's Eagles breed on Raptors View - Steve Benbow

On 1st December a raptor’s nest was discovered close to the new Zebra Trail; it was a structure of inter-woven twigs and branches in a Knobthorn, and the birds were Wahlberg’s Eagles (Hieraaetus wahlbergi) which are summer migrants to our region, although they are quite common throughout Sub-Saharan Africa.

Raptor's View

Wahlberg’s is a relatively small eagle, uniformly brown in colour with a small crest not always visible. Occasionally, pale morphs are spotted with a creamy-white head and underparts. ‘Our’ eagles were the more common brown variety.

I was able to access the nest along one of the drainage lines, getting reasonably close and decided to sit under a bush and wait to see what occurred. I was lucky enough to see one of the adult eagles (presumably mum) sitting on the nest and within a few minutes the male appeared with what looked like a small lizard which was immediately consumed amongst much vocalising. I sat and watched for around an hour and dad brought in a further two lizards. It was during the second visit that I noticed a chick in the nest alongside mum.

Raptor's View
Raptor's View

Over the coming weeks I visited the nest on several occasions and was fortunate to see the chick develop as both mum and dad proved to be good providers bringing food to the nest at regular intervals. Wahlberg’s Eagles tend to feed mainly on small mammals, reptiles, frogs and invertebrates as well as birds and it was mainly small (ish) lizards that I saw, however in the nest I could see what looked like a snake skin turned inside out to get at the meat inside, so they are not averse to predating on snakes.

By the end of December the chick appeared to be fully feathered and I expected it to ‘fly the nest’, however from further research I found that although Wahlberg’s are fully fledged at around 42 days, they stick around the nest for a further 4 weeks, presumably relying on the parents to provide food while getting stronger and ready for the flight back to warmer, northern climes during our winter. I’m hoping to capture further images of the fully-developed chick prior to its migration from the Lowveld. Check out the Birds of Raptor’s View Facebook site for updates on this story.

Through the Office Window - Derek & Sarah Solomon
Raptor's View

It’s rather a grumpy looking frog with a fat round body and short little legs. It lives underground, usually emerging after heavy rains to find food and to mate.

We are lucky to have one of the best ‘through the office window’ views we know; and are constantly distracted by the comings and goings of our local wildlife.

With the recent rain the Bushveld Rain Frogs have been calling happily.

Interesting Sightings on the Estate
Raptor's View

This beautiful creeper festooned many shrubs along the main road through the estate (Tawny Eagle) on the morning of 20 November (after heavy rains). Unfortunately it was only brilliantly noticeable for that one day.


Thanks to all the botanist residents on the estate for the Asparagus ID – possibly Asparagus macowanii Zulu Asparagus. Sarah Solomon

Those same botanists are doing the most amazing work IDing the flora on the estate,
with a challenge to get to 300 species by winter!
Raptor's View

Spotted Eagle Owl – one of a pair that live near the small river bed behind our stand, RV214; and we have so enjoyed hearing their mellow hooting call at night.
Marion Stroeve

Raptor's View

This image was captured on a camera trap immediately in front of my house. The African Hawk-Eagle had killed a guineafowl at this spot the day before and returned several times to feed.
Tony Patten

Raptor's View

We’re always happy to get images of this Aardvark who visits our bird bath quite often!

Spencer & Cheryl Morrison

Raptor's View

This Spotted Hyaena was a surprise night visitor to our birdbath!

Derek Andrews

Raptor's View
Raptor's View

An update on our nesting Spotted Eagle Owls – as per the last issue of The Raptor this is the fourth breeding record in a bowl in the trunk of a large Schotia (Weeping Boerbean). We had 2 hatchlings this time and they co-habited very amicably for about 3 weeks until they left the nest overnight, we think prematurely. We only saw one with Mom after that. They found a spot in a little cave under a tree stump in the bank of our river so we could keep an eye on them until the chick fledged about 2 weeks later. All the while, the male was on duty hoo-hooing through the night. We heard them around for another 3 weeks before they left the area.

Keith Hartshorne

Raptor's View
Raptor's View

Our Spotted Eagle Owl pair appeared at the bird bath one evening with a large and rather unskilled chick in tow. The chick eventually tried (after a lot of enthusiastic head bobbing) a very short flight onto a low branch and promptly fell off. 

One can only hope he/she survived long enough to master the necessary life skills under the watchful eye of the parents.

There are several breeding (or attempted breeding) records and sightings on the estate so it would be interesting to know how many pairs there are resident here.

Derek & Sarah Solomon

Raptor's View

Lovely to see this herd of kudu from my deck enjoying the (finally) full Hamerkop Dam.
Ali Joy

Raptor's View

Hamerkop Dam has been very busy with these Yellow-billed Storks, Spoonbills, White-faced Duck, Knob-billed Duck and many others.
Ali Joy

Raptor's View

Thought to be Schlegel’s Beaked Blind Snake.
Steve Benbow

Raptor's View

Spotted Bush Snake
Simone Braun

Raptor's View

Halictid Bees
Chris Hines

Raptor's View

Duelling Speke’s Hinged Tortoises – Savannah, Lydia, & Lawrence Morgan

Raptor's View

Delta lepeleterii, Mason Wasp
Mike Whatmore

Raptor's View

Mauritian Tomb Bat
Mike Whatmore

Raptor's View

Slender Mongoose & Spotted Bush Snake battle – Morgan Family

Raptor's View

Mating Monitors
Savannah, Lydia, & Lawrence Morgan

Raptor's View

African Rock Python
Simone Braun

Savannah Morgan has made a great video of the duelling tortoises and the mongoose and snake battle see it on YouTube HERE

 

And Steve Benbow has a great camera trap video of mating Common Duiker –

see it on the RV website HERE

Photo Gallery
Raptor's View

Solenosthedium liligerum, Jewel Bug – Thinus Potgieter

Raptor's View

Cape Glossy Starling – Mark Lotwis

Raptor's View

Vine Snake – Thinus Potgieter

Raptor's View

Laughing Doves – Mark Lotwis

Raptor's View

Woolly Bear Caterpillar – Thinus Potgieter

Share:
Share on facebook
Facebook
Share on twitter
Twitter

Leave a Reply

Your email address will not be published. Required fields are marked *

Recent posts
Follow us on Facebook