Showing posts with label winter. Show all posts
Showing posts with label winter. Show all posts

Saturday, July 24, 2010

The dry season


CRUNCH... CRUNCH... CRUNCH...
This is me trying to walk quietly at my study site.

Rattle... scuff... rustle, rustle... crackle...
This is a passing mongoose.

Ah, the dry season. It's like being lost in a watercolour painting: everything is muted cream, fawn or gold.
With no rain since May, the corkwood and marula trees have now lost their leaves, and the smaller shrubs are busily shedding. This profligate loss of foliage has turned my world into wall-to-wall, crispy leaves. The mongooses have to burrow beneath this crunchy layer to hunt for food. Like a cartoon mouse under a carpet, they create moving eruptions of leaves as they pursue bugs 'below leaf', and then pop back up into the daylight crowned with leaf fragments. I get nervous that I'll inadvertently step on someone who's resting under cover.

The autumnal colours of a red bushwillow (Combretum apiculatum). Humour me, OK. This is the nearest I get to 'Fall'.


The colourful senescence of a blue thorn (Acacia erubescens), the most hated plant in the lowveld (well, in my study site at least). It has wicked black-tipped thorns (indestructible) and yellow papery bark that peels off (probably as a result of the caustic verbal abuse heaped upon it by those unfortunate enough to brush it).

As the dry season progresses, my popularity at the study site grows. And not just with the mongooses.

This morning, when I placed a small bowl of water at the foot of Ecthelion's termite mound (bribery's a vital part of maintaining good relations with one's study subjects), I was beleaguered by a twittering cloud of locals.
With no access to standing water for about eight months of the year, the resident fauna is adapted to scrounging sufficient moisture from its victuals. But just because the locals can survive without drinking, it doesn't mean they don't like a drink.


Happy hour at Halcyon.


While Ecthelion crowded around the water, the waxbills and fire-finches gathered in the surrounding bushes, chirping for all they were worth. The moment the mongooses turned their backs, the birds fluttered down en masse, to jostle at the bowl's rim. Generally, adult mongooses ignore these thirsty interlopers, even though they'll prey on birds unable to fly. But juvenile mongooses are another story.
Moxa, the youngest member of Ecthelion, was in top form today. Every time he glimpsed the waxbills and fire-finches crowded around the water bowl, he'd hurtle into their midst, leaping up to half a metre in the air and plummeting down among them. With a great whirring and clatter of wings, the birds fled, simply resuming their perches above the bowl and leaving Moxa to crouch fiercely by the dish (like a runner awaiting the starter's gun), glaring up at them with alarming intensity. I haven't figured out whether this activity – popular with all mongoose pups - is a game or a serious attempt at predation (it's never successful). However, Moxa certainly seemed peeved at the audacity of mere prey items, and I secretly sympathised with him. The birds don't just filch a sip of water, they can't resist taking a bath as well, wantonly splashing water everywhere and - to my neurotic mind – transmitting their 'bird germs' (avian TB, psittacosis??) to my mongooses.


Blue waxbills (Uraeginthus angolensis) wetting their whistle. By the end of the dry season, clouds of these little guys accompany me while I search for the mongooses, waiting impatiently to thieve the mongooses' water.

 Of course birds aren't the only thirsty locals. This morning a rough-scaled plated lizard (who resides at this particular termite mound) cautiously joined the fray. Even when sharing a home, he and the mongooses ignore one another; an act of great forbearance on the lizard's part, considering that the juvenile mongooses like to pounce on him in play. The only time his equanimity falters is when they gnaw on his legs; then he whisks around with unexpected agility to lash at them with his tail (much to their excited delight).


Rough-scaled plated lizards (Gerrhosaurus major) won't indulge in drinking games. They're omnivores and during the winter dry season they like to make a meal of fresh mongoose faeces (arrgh! I'm trying to document the size of mongoose latrines!).

Saturday, June 26, 2010

Weird sunbather


One of the challenges of winter is getting out of bed.
But if it's cold here, at least it's sunny, with glorious blue skies every day.

As I waddle out to the car every morning, swathed in jumpers, scarves and gloves, I gaze longingly at the pools of golden sunshine. Ah... just to sit and soak up the warmth... Then, moments later, I drive past someone doing exactly that.

About 300m from my house, my drive mounts the embankment of a manmade dam, and runs along the dam wall amid a jungle of tall reeds and grasses.
It's here that I meet the sun-worshipper.
Pressed against the tangle of reeds, wings extended and tail lowered, he epitomises sun-soaking contentment. Slowly he opens his eyes as I approach and then, as my car makes its second faltering attempt to crest the slope, he gives an irritated shrug, shuffling his raised feathers back into place. But he doesn't move away, mind you, even though we both know I must drive within a couple of metres. Only if I stop beside him does he scramble away into the undergrowth.

He's a Burchell's coucal (Centropus burchelli) and like all his kind he's got attitude. Coucals are large striking birds with bright chestnut wings, a black hood and creamy front. Their flight is slow and clumsy (and they've a tendency to crash land) but on the ground they run with speed and agility.


A Burchell's coucal basking in the sun. Unlike most birds, coucals have two toes that face forward and two that point backward (zygodactylism) to help them clamber in the shrubbery. They also sport a huge, scimitar-like claw on one of their rear toes. Photo by Arno Meintjes.

Coucals used to be members of the cuckoo family, but they've now been banished to a family of their own (Centropodidae), probably because they subversively raise their own chicks. Actually, it's only the male coucal who's made this radical break from tradition; his mate continues to fritter away her time, mating and egg-laying. The diligent male (distrustful of foster families?) weaves the domed grass nest, sits on the eggs and ferries assorted bugs to the chicks. The closely related black coucal (Centropus grilli) takes this domestic arrangement even further. Female black coucals team up with multiple males and each one raises a nestful of chicks just for her.

Burchell's coucals are fierce predators, doing in large insects, eggs, nestlings and any other unfortunate beast that crosses their path. They happily raid mist-nets, and sprint along ahead of grassfires snatching up fleeing refugees. Photo by Arno Meintjes.

Whether it's a consequence of maternal neglect, or the embarrassment of being reared by a biological parent, coucal chicks turn out VERY weird. They look like gremlins, with ink black skin and spiky white hair. Actually, the hairs are really simple, tubular feathers (called trichoptiles) which bear an unhealthy resemblance to the earliest feathers of the earliest birds. When the coucals' nest is threatened, the chicks give an excellent rendition of snake-like hissing, and if this fails to deflect the intruder, they high-tail out of the nest, squirting a foul-smelling jet of excrement as they go. Their legs develop much more rapidly than their wings, so even young nestlings are well equipped to scramble off into the undergrowth. Once the danger's passed, they all come clambering back into the nest to resume the pretence of normality.

This chick is actually an Australian pheasant coucal (Centropus phasianinus) and the photo was taken by Ian Sutton. Click here to see pictures of Burchell's coucal chicks (different but still mighty weird).

If Burchell's coucals have a strange family life (and who doesn't) at least they have beautiful calls. Colloquially known as rainbirds, pairs tend to duet when the humidity climbs. Their resonating calls have an other-worldly feel and are reminiscent of water gurgling from a bottle (I know that doesn't sound like it would be nice, but it is). Decide for yourself by listening to the call here (the second recording - a pair dueting - is best).

There are around 30 species of coucal loitering in the rank thickets of the world, with five species living in southern Africa. This Burchell's coucal was photographed by Arno Meintjes.
Related Posts Plugin for WordPress, Blogger...