The giraffe is nearly down. Two men have stretched a thick black rope in front of the animal, to trip her up. The giraffe hits the rope, and the plan seems to be working until she gains a second wind and breaks into a fresh run.

Her body sways backward and forward like a rocking horse being pulled along on a dolly. Six more people grab onto the ends of the rope, and the group runs behind her, holding tight, pitting their meager strength against her weight. It would be no contest, were her veins not coursing with tranquilizer.

She loses her footing and careens forward, her legs splaying out behind her. But her seven-foot-long neck still stretches resolutely skyward. A woman leaps from behind her back, collides with her neck midair, and rugby-tackles it to the ground. People run over, carrying a hood and a drill. The giraffe—an emblem of verticality—is now fully horizontal.

The team of people who have drugged, tripped, and tackled the giraffe is a mix of scientists, veterinarians, and rangers who study giraffes in the few parts of the world where the animals still live.

Giraffes are so beloved and familiar that it’s tempting to think their numbers are solid and their future secure. Neither is true.

Giraffe populations have decreased by 30 percent over the past three decades. Only 111,000 individuals remain. There are at least four African elephants for every giraffe. To safeguard a future for giraffes, researchers need basic information about how far they roam. GPS trackers can offer answers, but to get a tracker on a giraffe, one must first take it down.

This is harder than it sounds, and it sounds hard. Etorphine—an opioid about 1,000 times more potent than morphine—is the preferred anesthetizing agent, but some giraffes resist doses that would knock out an elephant. And unlike elephants, many of them respond by breaking into a run.

Also, etorphine depresses a giraffe’s breathing, reduces its heart rate, and increases its blood pressure. The drug is tolerable in the short term, but after only 15 minutes, it can cause problems for an animal whose heart must pump blood up a seven-foot neck. A darted giraffe must be tripped as quickly as possible.

Once it’s horizontal and restrained, the team can immediately reverse the etorphine with a second drug, while attaching a tracker.

“You want it to stand up as soon as possible,” says Sara Ferguson, a vet for the Giraffe Conservation Foundation, and the woman who body-slammed the giraffe’s neck. Though they look slender, giraffes are massive, sturdy animals. The head and neck alone can weigh 600 pounds—more than a large black bear. When males fight over mates, they swing their necks in long arcs to bludgeon each other with their reinforced heads. Their necks can take the impact of one airborne vet.

Until recently, giraffes have suffered from surprising scientific neglect. Few researchers have studied them in the wild, so even basic aspects of their lives remain mysterious. Perhaps that’s because giraffes live in what researchers suspect are protean societies lacking the cohesiveness of elephant herds or lion prides. Whatever the reason, one of the world’s most conspicuous creatures has somehow been overlooked. The same goes for its impending extinction.

And without fanfare, many other major animal groups—insects, birds, and amphibians—have also declined precipitously. Quite a few of the public’s favorite wild animals, including lions, cheetahs, and gorillas, are in greater peril than is widely realized. But, according to a 2018 study, this gap between rose-tinted perceptions and dire reality is greatest for giraffes. Their prevalence in the zeitgeist has masked their disappearance from the planet.

In 2010, eight times as many Sophie the Giraffe teething toys were sold in France alone as there are actual remaining giraffes. In 2016, the number of Britons who watched a giraffe kick a lion in Planet Earth II exceeded the giraffe population by more than a hundredfold.

That same year, the International Union for Conservation of Nature reclassified the giraffe as “vulnerable” to extinction. Even this grave assessment might be too optimistic: New genetic evidence suggests that the giraffe may actually be four separate species that have been evolving on their own for 1 million to 2 million years. The iconic animal faces several falls instead of one.

Ferguson and her colleagues are trying to find out how the giraffe became so endangered, and how to save it while they still have time. They’re traveling across the few parts of Africa where giraffes still exist, to affix trackers to several hundred individuals. The process is exhilarating, but also dangerous—for both humans and giraffes. Julian Fennessy, the foundation’s founder and director, only recently recovered from three broken ribs and a dislocated shoulder, sustained when the neck of a stumbling giraffe fell across his torso. He sometimes has to reassure tourists on safari that he is not a poacher. On occasion, his team has had to free tranquilized giraffes that got stuck in trees, or steer them away from rivers.

Imagine you are one of these giraffes. You are the tallest thing for miles. Everything about you defies gravity. Your hips and shoulders are level with the tops of many acacia trees, which to shorter mammals are the world’s ceiling. Your head rises 19 feet into the air. As your sharp gaze sweeps over vast swaths of savannah, you see five jeeps driving toward you.

Riding in the jeeps, we head toward a group of giraffes. I’m in one of the back jeeps, standing next to two men from the Kenya Wildlife Service. We watch the animals graze quietly, using their long, prehensile, bizarrely bluish tongues to rip foliage from the trees’ thorny branches. Giraffes evolved from short-necked ancestors, and whether they stretched to feed on leaves that are beyond the reach of competitors, or to swing their head with greater force during ritual combat, or to keep an eye on approaching predators, they ended up with a neck that’s more than twice as long as that of any other living animal. They’re tall in a way that the planet hasn’t otherwise seen since the dinosaurs’ reign. On Kenya’s Laikipia Plateau, where the landscape is all flat-bottomed clouds and flat-topped acacia trees, they tend to stick out.

From the lead jeep, Dominic Mijele, an experienced vet from the Kenya Wildlife Service, selects a female—the one that Ferguson will later tackle—and uses a tranquilizer gun to shoot a pink-tufted dart at her. His aim is perfect. The dart embeds in the giraffe’s right shoulder and delivers its etorphine payload. The female twitches nonchalantly, as if bitten by a horsefly, and returns to eating. For a few minutes, nothing happens. Then, she starts running.

Unexpectedly, a calf runs behind her. It can’t be more than two weeks old, but it was born taller than most of the people pursuing it. Its presence complicates matters, but it quickly takes itself out of the equation by crouching and hiding, flattening its neck in a most un-giraffelike way. Its mother, meanwhile, leads the jeeps on a chase.

We tear after her, swerving between the trees and occasionally bulldozing them. When the terrain allows, we leap out and sprint after her, ducking branches covered in inch-long thorns. If the giraffe falls backwards, she risks serious injury to her head and neck. Taking a page from The Empire Strikes Back’s playbook, the team tries to wrap ropes around her legs and guide her into a safer forward stumble.

After Ferguson brings her down, four rangers sit astride her neck like bobsledders. Someone slips a hood over the giraffe’s head so she can’t see. Another threads a device into a nostril to collect data on the animal’s breathing. More than a dozen people surround the giraffe to measure her, collect samples of her skin and DNA, and pick off ticks, while sloshing water on her side to keep her cool. With the effects of the etorphine reversed, the animal is fully conscious, but calm. Nonetheless, everyone stays back from her long and powerful legs, which can deliver a lion-disemboweling kick.

At the giraffe’s head, Fennessy kneels down and begins to attach the tracking device—a black box, no bigger than a pack of cards. Some people call it a collar, but it’s not meant for the animal’s neck. Nearly two decades ago, when Fennessy’s team first tried tracking giraffes with GPS, it used gigantic collars adapted from those used on elephants, but the giraffes just bent their heads and slipped the devices off. It also tried fixing the collars in place with elastic straps, but feared this might restrict the animal’s esophagus. Head harnesses weren’t quite universal enough to fit the unique head shapes of each giraffe species, and creating one for each species was too expensive. Eventually, the team hit upon the perfect solution: Fix the tracker to a giraffe’s ossicones, the pair of hornlike structures on top of the animal’s head.

Giraffes hit each other with their ossicones, so these structures are thick, bony, and insensitive, with only one nerve at their base. When Fennessy drills a hole in one of them, his subject barely reacts. He threads a steel bolt through the hole, and fastens the unit in place. Once it’s secure, the hood is removed, the men on the neck get off, and the giraffe lifts her head. The seven vertebrae in her neck—the same number as in a human’s—are connected by ball-and-socket joints like those in our shoulders, so instead of lifting up like a rigid beam, her neck snakes upward in an almost reptilian way. She staggers up, and Fennessy slaps her on the rump to get her moving. After a few unsteady steps, she walks off. Somehow, whether through her reportedly excellent (but seldom tested) eyesight, or through low, infrasonic calls (that have long been suspected but never documented), the mother detects her hidden calf, and makes a beeline toward it.

“We’ve swept an area and come back literally the next day to find new snares,” she says. Four of the 11 giraffes the team collared in Kenya in 2017 were likely poached, “a much higher rate than anyone suspected,” says Jared Stabach of the Smithsonian Conservation Biology Institute. Unlike elephants, rhinos, and pangolins, giraffes aren’t poached to supply a big, illegal, international market in body parts. Instead, in countries like Kenya, people mostly kill giraffes for their meat—to feed themselves, their families, their villages. “They’re a shitload of food,” Fennessy says.

Poaching is only one threat among many to giraffes. It’s a significant threat, it’s easy to visualize, and it offers an antagonist to focus on—but there are less direct and dramatic ways of killing a giraffe.

Since the 1970s, Kenya’s human population has more than quadrupled, and it is projected to double again by 2050. Livestock populations have also ballooned, and now collectively outnumber wildlife biomass by a factor of eight. Not coincidentally, wildlife numbers have declined by about 70 percent. As the human world expands, the world for wildlife contracts. Giraffes are left with few resources as more land is dedicated to agriculture and livestock. Humans’ and other animals’ very presence can make life harder for giraffes. They flood the landscape with loud noises, divert water for irrigation, and overgraze the land. “They chop down trees for charcoal, so there’s nothing to eat,” says Symon Masiaine, who leads a team called Twiga Walinzi, or “Giraffe Guards.” “The livestock disturb [giraffes] from grazing. The dogs chase them.” People block giraffe migration routes with fences and roads.

Growing human populations and the fragmentation of the landscape are the biggest culprits behind the decline of giraffes. David O’Connor, who researches population sustainability at San Diego Zoo Global, points out the problem on three maps. The first shows where giraffes lived in the 18th century—a broad, continuous brushstroke sweeping over much of Africa. The second shows their current whereabouts—a few pathetic splotches totaling just 10 percent of their former range. The third superimposes all of Kenya’s ongoing and planned development projects onto that shrunken range, which becomes further fragmented. The pattern reminds me of the one I’ve been staring at for days: the islands of tawny brown on a giraffe’s hide, separated by unbroken white lines. It’s as if the giraffe’s woes have been etched onto its skin.

“When the land is not open, it reduces the animals’ ability to be flexible to change,” Fennessy says. And change is certainly upon them. Kenya’s temperatures are set to rise by an estimated 2 degrees Celsius by 2060. Giraffes, already confined to the driest regions that are untouched by agriculture, must now contend with shorter rainy seasons, more erratic rainfall, and more severe and prolonged droughts. Pastoralists, who once had free rein of Kenya’s lands, must deal with the same challenges. Decades of decisions by British colonialists and the postcolonial government have severely restricted their lifestyle. Constrained and marginalized, they now compete with giraffes for the same dwindling resources, through the same climatic upheavals. Conflict is inevitable, and the giraffes almost always lose.

“All of these things make the animals immune-compromised and more susceptible to disease,” says Maureen Kamau, a veterinary fellow with the Smithsonian Conservation Biology Institute. Giraffes across East Africa have been known to carry a mysterious skin disease that causes oozing, crusty lesions on their limbs and necks. Other species are experiencing similar problems: In Laikipia, a previously healthy population of wild dogs was all but wiped out in 2017 by a virus that spread from domestic canines.

These combined stresses are especially costly for giraffes, which reproduce only a few times in their lives, and gestate for 15 months. “Anything happens during that period and it’ll lose the young one, and when it’s got all these other threats, it won’t breed,” Fennessy says.

The story of the giraffe’s decline is not one of villainous poachers and murdered animals. It is a story of two species dealing with the same crowded, rapidly changing world.