(CNN)Across Southeast Asia, wild animals are being hunted out of existence to feed growing demand for bushmeat, according to conservationists.
Thomas Gray, science director with conservation group Wildlife Alliance, which operates in Cambodia, says that snares -- simple traps made of wire and rope -- have become the single biggest threat to ground-dwelling animals in Cambodia, Vietnam and Laos over the last decade.
The scale of the problem is "phenomenal" says Gray.
Between 2010 and 2015, more than 200,000 snares were removed by patrol teams from just five protected areas in the region. But despite these efforts, says Gray, law enforcement patrols can't keep pace with poachers and stop the slaughter.
Typically made from motorbike and bicycle brake cables, snares are cheap and simple to construct. Traditionally, hunters made snares from rattan and other natural forest products which were "relatively weak and decomposed relatively quickly," says Gray. Wire snares require much less skill to make and can last for years.
The hunters' targets are animals they can sell as food, including wild pigs, muntjac deer, civets and porcupines.
But the tragic thing about snares, says Gray, is that "they take out everything." Animals caught in these "barbaric" devices face a lingering death, he says. A few manage to escape, but are likely to die from their injuries -- sometimes because they have gnawed off a limb to free themselves. Trapped animals without market value are simply left to rot in the forest.
Southeast Asia's forests once teemed with myriad species, including sun bears, striped rabbits, marbled cats, hog badgers and monkeys.
But the snaring epidemic is leading to what conservationists call "empty forest syndrome." "In some areas there are no mammals larger than a rodent left," says Gray.
A perfect storm
In Cambodia, setting snares is illegal in protected areas -- where most of the wildlife is found. Selling the meat is also illegal, says Gray. But that has not deterred poachers.
Demand for wild meat is fueled in part by rising incomes in the region, says Regine Weckauf, illegal wildlife trade advisor with Fauna & Flora International. Research conducted by the non-profit in Cambodia identified two main types of consumer.
"In rural areas, people generally consume bushmeat because they like the taste," says Weckauf. "Often, they don't realize it's been sold illegally." For urban consumers, in the capital Phnom Penh and other big cities, eating wild meat is an "elite practice" she says -- and it's almost exclusively men who do it.
Procuring wild meat when entertaining associates demonstrates power and status, says Weckauf. "It shows that the man can afford the meat and that he's well connected and knows how to source it." In cities, many consumers know that wild meat is illegal, so providing it also sends the message, "I am untouchable," she says.
Similar patterns of consumption have been observed in Vietnam.
According to Gray, the perception of bushmeat as a prestige food has combined with changes to the landscape to create a "perfect storm" for Southeast Asia's wildlife.
"Fifty years ago, people would have set snares within walking distance of their village, for their own consumption," he says, "but the rest of the forest wasn't snared."
Since then, he says, rampant deforestation, expanding road networks and the ubiquity of motorbikes have led to forest interiors becoming accessible like never before and subsistence hunting has developed into commercial poaching.
Cambodia's wildlife is also squeezed because the country has one of the biggest deforestation problems in the world. It was once cloaked in lush forests but huge expanses have been cleared by loggers and to make way for roads, fields and vast rubber plantations.
Analysis by scientists from the University of Maryland and Global Forest Watch has revealed that although other countries are losing more forest in terms of area, Cambodia's forests are being cleared especially rapidly. The country lost four times as much forest in 2014 as it did in 2001.
However, although logging and deforestation destroy the animals' habitat, Gray says that by the time the trees are cut down, most of the animals have already been killed by hunters.
The toll of snaring on many species across the region has been devastating. The saola, a mysterious antelope-like animal that was only discovered by scientists in 1992, is on the brink of extinction -- it has fallen victim to snares despite not being a target species, says Gray.
The dhole -- a tawny-colored wild dog -- is also highly endangered. "There are probably fewer dholes left than tigers," says Gray, 'but they don't get the same level of attention."
Dholes are especially susceptible to being caught in snares, he says, because they roam over large distances in search of pigs and deer which are, themselves, becoming increasingly rare because of snaring. Gray says dholes are thought to be extinct in Vietnam and are likely to become extinct in Laos. "There is still a decent population in Cambodia, but if we don't solve the snaring crisis, they will go too."
Wildlife Alliance operates a team of 110 rangers who work "24/7" removing snares from the Cardamom rainforest in western Cambodia , says Gray. In 2018 alone, the team, working in partnership with the Cambodian Ministry of Environment, removed 20,000 snares and destroyed 779 illegal forest camps -- structures built inside protected areas where poachers sleep and store equipment and animal carcasses.
Rescued creatures are cared for at the Phnom Tamao Wildlife Rescue Centre, which houses more than 1,400 animals -- some of which are released in safe areas and some of which stay there for the rest of their lives, depending on the severity of their injuries.
This work is vital, but it's not nearly enough, says Gray.