My love affair with the Limpopo began relatively late in life.

Although it forms the southern boundary of the country I grew up in, until I moved to South Africa in 1984, my sole acquaintance with the river had been crossing over it at the Beit Bridge border post.

In the back of my mind, though, I always had this strange feeling that it was waiting for me, beckoning me, and that I was duty bound to answer its call.

And so I did.

All rivers have their own personalities and the Limpopo is no exception. In his “Just So” stories, Rudyard Kipling famously characterised it as the “great, grey-green, greasy Limpopo, all set about with fever trees”.

It is an apt description. There is something rather wild and romantic about the Limpopo; it is both a purveyor of adventure and a river which seems to have its origins in the realms of legend and folk lore.

Even the name sounds made up.

Approximately 1600 kilometres long, it flows in a huge arc after leaving its headwaters in the Krokodil (Crocodile) River in the Witwatersrand. Skirting the edges of the Kalahari it passes through some of the driest, least populated areas in South Africa before making a dog leg in to Mozambique and then disgorging itself in to the ocean near the port town of Xai Xai.

In its own way, it is the embodiment of both the sheer size and the mystery of Africa. The sky above it is huge, the horizon stretches out forever. Travelling towards that horizon you are always conscious of the distance between it and you.

Despite being the second largest river in Africa – next to the Zambezi – that flows in to the Indian Ocean, for a substantial part of the year it contains very little actual water. In dry years its upper reaches flow for 40 days or less.

This can change very rapidly. The one time I visited, a heavy rain storm somewhere up near its source had seduced the river in to breaking loose. Standing on the bank the raging torrent whooshed past us, the colour of caramel, swirling around rocks and eddying over tree roots.

It was a brute demonstration that the Limpopo was not to be messed with when aroused. The next day it had dwindled back to almost nothing…

For my first foray up to the drier western section of the river, I arranged to stay at Ratho, a large agricultural estate, just upstream from the Pontdrift Border Post with Botswana, which has camping facilities on its banks.

To get there you travel north from Jo’burg on the N1, branching off at Polokwane and heading towards Vivo. Beyond this tiny settlement, the road runs through open, rather lonely country. About 100 kilometres further on you reach the oddly named Alldays, a straggling, dusty town only a few streets deep from front to back.

Here you veer left.

As the horribly pot-holed road drops down to the border post at Pontdrift, a change suddenly takes place: at this point of its long journey to the sea, the Limpopo opens in to an immense valley hemmed in by sandstone cliffs, mesas and buttes that glow as if they were red hot. In places they have been honeycombed by erosion and blackened by fires. Out of the sides of the cliffs and the rocky outcrops grow fig trees with long, trailing, ghost-white roots. These are Large-leaved Rock Figs or Ficus abutilifolia.

There is something both wonderful and tantalising about this strange, eroded scenery.

There was no water flowing in the river when we arrived at Ratho although, on our walk the next day, we did find a long, rather greasy-looking pool further upstream, concealed in a grove of tall, thorn trees. There was something a little scarifying about this shadowy section of the river.

I found myself wondering what dangers lurked beneath its placid surface. It looked like the sort of place where an elephant could have easily got his trunk, courtesy of an enormous crocodile.

There was plenty of evidence of elephant being about as well, which also made me a bit nervous…

Back in camp, dangerously untroubled by doubts, my birding colleague decided to take advantage of this absence of a liquid barrier in front of us and sallied forth across the dry river bed, disappearing in to foreign territory. More circumspect by nature, I declined to join him.

In the end I was rather glad he didn’t get trampled on by an elephant or eaten by a lion or carted off in irons because if he hadn’t made it back safely he would not have been able to find me the elusive Pel’s Fishing Owl, that evening. We heard it before we saw it, a strange, pig-like grunt which was then followed by a deep, booming ‘hoo-huuuum‘. Grabbing his binoculars and powerful spotlight my birding colleague eventually located it sitting in a tall thorn tree.

It was a bird I had long wanted to tick off my “Lifer” list. What made it all the more exciting was that we hadn’t needed a guide to find it for us which is usually the case with this bird, which Roberts describes as: “Vulnerable… largely confined to to protected areas, threatened by disturbance…” We were also lucky to find it because we were on the western-most extreme of its range.

From Ratho, we returned to the main tar road and then struck eastwards towards one of South Africa’s most important Stone Age archaeological sites – Mapungubwe.

I have a tenuous family link with this area. Somewhere between Pontdrift and Mapugubwe a bunch of my ancestors forded the Limpopo on the 1892 Moodie Trek to Gazaland. In the diary she kept of the journey, my great-grandmother, Sarah Susannah Nesbitt, describes the river as being “very rough and stormy” and says they crossed at a point called “Selika’s Wegdraii” (this could possibly be the old crossing which is today known as “Rhodes’ Drift”).

Every night they heard lion, sometimes close by, sometimes further off across the river. The sound sent chills through my great-grandmother because she had her two infant daughters (who included my grandmother, Josephine) with her and was worried for their safety as they lay there in their wagon.

This was not their only concern. Having crossed the river the trek-party found themselves faced with another problem when they got delayed at Macloutsie, in Bechuanand (now Botswana), by an outbreak of foot and mouth disease with many of their animals becoming so weak they fell easy prey to hyena.

Travel was a lot more difficult in those days.

Mapungubwe is one of those places I find myself drawn to like a pin to a magnet. Once a thriving city and important trade centre with links as far afield as China, India and Egypt, it was abandoned in the 14^th Century for reasons largely unknown.

There is still a rather eerie feel to it. This is a place of secrets and questions…

Driving through its strangely puckered landscape, I found myself wondering why its original inhabitants had chosen to settle here. It seemed to me this wasn’t a country to live in at all with the heat and the desolation but – who know? – maybe the climate was different back then?

It is good country for birds, however, including yet more varieties of owl. At night you can regularly hear Wood Owl, Pearl-spotted Owl and African Scops Owl. Pel’s occurs here too although I haven’t seen it.

On the one occasion, driving out from camp, just before dark, we hadn’t got very far when we spotted a Giant Eagle Owl squatting on the ground, next to an old termite mound. It was so close I felt I could lean out and touch it. Perhaps suspecting I might actually attempt something so impertinent the huge bird suddenly rose in the air and flapped off to a nearby tree.

In the half light of the forest it sat and regarded us from this perch. Relaxed, enormous, extraordinary with formidable talons, curved black beak, deep, luminous, saucer- like eyes and finely barred grey overalls it seemed quite unconcerned by our presence.

Every now and again it would blink at us, like a camera shutter going off, and tilt its head sideways as if trying to get a better angle to observe us from. Or maybe it was just sizing up my birding colleague as a potential meal.

It was difficult to tell.

Watching it, I could not help but reflect on what a marvellously well adapted creature it was. Shaped by millions of years of evolution everything about it is tuned to hunt and kill at night. In the dark it can see with precision things which for you and I are just a generalised blur.

Perhaps because it is such harsh and difficult country, the park is always a scene of restless, unremitting activity devoted to the purpose of staying alive. There is always something to see.

The Maroutswa Pan in the Western section of the Park is usually well worth a visit as there are invariably herds of animals and flocks of birds coming down to drink, especially in the dry season.

One of my special memories of the pan, is returning at dusk as the sun was touching the leaves of the tall Lala palms in the rectangular-shaped clearing nearby and golden sheets of silken light came pouring down. It was an extraordinarily beautiful scene.

The Eastern section is more broken country but is also full of scurrying, browsing and fluttering life. From a raised walkway that leads through the canopy you can view the river in both directions. There are usually elephant here. It is also a good place to get Meyer’s Parrot and Broad-billed Roller too.

A kilometre or so downstream from here there is hill top view point which once served as an old SANDF army base during Apartheid day because of the immense view it gave over the surrounding bush.

It has become a place of pilgrimage for me. It is here, at the confluence of the Shashe and Limpopo rivers, that the borders of the three countries – Zimbabwe, Botswana and South Africa – that have played such a pivotal role in shaping my life converge.

It is difficult to exaggerate the wild, romantic beauty of this spot with its great baobabs and fig trees growing out of a chaos of rocks. Standing on the edge of the cliff face I sometimes feel like I have been magicked into some parallel world. This is the ancient Africa of myth which the old writers and cartographers had heard about but weren’t too certain how to depict in their books and their maps.

From Mapungubwe the Limpopo continues its long, leisurely loop along the border with Zimbabwe before crossing in to Mozambique at Pafuri. When I do this route I normally stop off at the town Musina to stock up with provisions.

The quickest way to get from Musina to Pafuri is probably to take the tar road that goes via the hot springs at Tschipise – but by using this route you miss out on seeing the Limpopo so we usually go on the old SANDF dirt road that runs alongside where the old minefield once was. In the past we have seen taxis parked here, picking up the Zimbabwean refugees fleeing across the river.

The road is in fairly good condition although, on the one trip, my birding colleague did manage to crack his car’s sump. Somehow we managed to get back to the tar and then limp all the to Tschipise without the engine seizing. At the local garage we gummed up the leak with soap and topped up the oil. That got us back to Musina where we were obliged to stay over while it got repaired.

Musina is an armpit of a place and not somewhere I would normally choose to stop for a night’s sleep on account of its perspiring proximity to the Limpopo river. It is definitely not the sort of town you want to get stuck in for any length of time especially in summer.

Apparently not everyone agrees with me. The copper mine which provided it with its reason for being might have closed but it is still a bustling, clamorous hub full of all the usual transients who ebb and flow around border towns – in this case mostly Zimbabweans come down to shop or escape that country’s collapsing economy and hoping to find employment in South Africa (the bush mechanic who fixed our car was one such refugee).

We checked in to a hotel on the main road. Towering cumulonimbus clouds were massing all around us and it looked like we were about to be inundated as fractious gusts of rain kept splattering against the windows of my room. The storm surge held back, however, as if it had had a sudden rethink, and then veered off to the West.

It had been a long day. Neither the sweltering heat, the music from the nearby bar nor the constant rumbling of trucks along the Great North Road, could disturb me. I fell instantly asleep.

Next morning, the car repaired, we resumed our journey along the Limpopo to Kruger.

Covering a huge swathe of the country Kruger is undoubtedly South Africa’s best known and most visited game park. Although most people are attracted by its animals – which includes the Big Five – it is also a Mecca for birders with over 500 recoded species.

One of the most popular of its birding spots, Pafuri, benefits from its proximity to the Mocambique coast and the Limpopo river that acts as a migration corridor to birds normally found further east and north. It was here, that I obtained my first sighting of the elusive Bohm’s Spinetail, a localised and uncommon species that favours riparian forest and is usually linked to baobab trees which this area has in abundance.

It is also where I saw my first Ayres Hawk Eagle, perched in a massive Jackalberry tree alongside the Luvuvhu River.

To get to Crooks Corner, another place I get a little sentimental about because it demarcates the meeting point of South Africa, Zimbabwe and Mozambique, you drive along the muddy Luvuvhu River, a tributary of the Limpopo. In the foreground the riverbank rises two to three metres and is capped by a flat plain whose edges are packed dense with tall Nyala, Jackalberry, Ana and Fever trees. Behind them, stretching away forever lies a sea of Mopani trees.

I like to stop for lunch at the picnic site on the Luvuvhu where the sunlight is subdued and dappled by the trees, and the place is alive with birds.

Crook’s Corner – which is where the Luvuvhu (strangely enough I have never seen this river without water) and Limpopo meet – is another spot where it would be quite easy to slip across the border by just strolling over the often dry, river. In fact, this is how it actually got its odd moniker – because in the early days fugitives from the law used to do just that.

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Here is another odd fact about it: in July 1950 a Zambezi Shark (Carcharinus lucas) was caught at the confluence of the Luvuvhu and Limpopo, hundreds of miles from the sea. Why it had decided to swim so far inland is a mystery.

Maybe, like me, it just responded to the river’s call…