The deafening noise had scared off elephants, giraffes and other wild animals, he said.
Down a dirt road, we came upon a family of giraffes eating in the trees.
The main attraction at the centre is the tree-high platforms from which visitors can get nose-to-nose with the giraffes.
There are giraffes aplenty, herds of antelope too, and wild pigs, monkeys, jackals and brilliantly coloured birds.
It will never be possible to conclusively prove what advantages selected for longer necked giraffes, say the researchers.
Other large herbivores, especially giraffes, will eat the plants, probably because they are not as bothered by the ants.
Giraffes ignored us as they ambled gracefully across the red clay road.
Animals such as giraffes and zebras roam the park outside the tent and campers can also see gorillas, leopards and elephants.
The idea is that down the generations, males evolved ever longer necks to dominate rivals for the affections of female giraffes.
Other main attractions include the speedy cheetah, giraffes, zebras, hippos, and crocodiles.
Plus it has some features no other Four Seasons offers, namely lions, elephants, giraffes and dozens of other stunning examples of African wildlife.
What's more, although giraffes do invest more in growing their necks than other body parts as they grow, both sexes do so equally.
Thousands of elephants, giraffes, zebras and other animals are in danger because there is not enough water to drink at the Hwange National Park.
Giraffes, hippopotamuses, lions, elephants, zebra, gazelles, cattle and horses roamed across grasslands that may have received ten times more rainfall than the same area today.
Rhinos charged the locomotives and giraffes chewed on the telegraph lines.
Keep an eye out for giraffes, rhinos, hippos and antelope too.
And there is little evidence that a large neck is costly to male giraffes, as generally male giraffes are no more vulnerable to predators than females.
As the animal wrangler on the South Africa-based CW series, he makes sure the show's animals (cheetahs, giraffes and lions among them) are ready for their star moments.
Elephants, giraffes and even lions wander around the eastern slopes of the mountain, and it is essential to be accompanied by an armed guide, although encounters with these animals are rare.
The first of the three parks we visited was Lake Manyara National Park, a lush nature reserve teeming with all kinds of animals, including giraffes, elephants, exotic birds and baboons.
Chinese fleets scoured the Indian Ocean, visiting Indonesia, Ceylon, even the Red Sea and Africa-where they picked up giraffes and brought them back to the amazement of the people back home.
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They had been returning from a visit to Waza National Park - which is described as a beautiful landscape, trodden by giraffes, elephants and antelopes - where they had spent the previous night.
We followed lion tracks for hours, passing elephants, hippos, and giraffes along the way, until we found our jackpot: two lionesses licking a freshly killed impala carcass as six cubs nursed and frolicked around them.
The fact the male giraffes uniquely wrestle for dominance by "necking" and "head clubbing" one another, with males with the longest necks and heaviest heads tending to win, has been forwarded as evidence to support the hypothesis.
But if it is a rocky world, its gravity would be about 2.4 times that of Earth - there may be life there, but I wouldn't expect to see anything as gracile as our giraffes or whooping cranes.
Glitches, like the laryngeal nerves that are so neatly laid out in fish but that must detour in animals with necks by a crazy 15 feet (4.6m) in the case of giraffes demonstrate the incremental, undirected business of evolution in touching detail.
Only last week in Ohio a man with a menagerie of more than 50 animals, including tigers, giraffes and bears, decided to open up his cages and then shoot himself in the head - after being convicted of animal cruelty.
Whirl in giant teapots at The Mad Tea Party in the Magic Kingdom Park, dance to Aerosmith on the Rock 'n' Roller Coaster at Disney's Hollywood Studios, or spot giraffes during a Kilimanjaro Safari at Disney's Animal Kingdom.
Nigel Raine, another ecologist from Royal Holloway, University of London, also studies these ant plants, and says that giraffes will go ahead and eat the leaves of the plants, although ants will then swarm onto their face and mouth and try to bite them.
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