Swiftlet’s Nest sought from China to Silicon Valley

To the Western palate, dining on bird spit may sound unappetizing. But to people here and across Asia, it is a highly coveted delicacy.

Nests made from the congealed saliva of Asian Swiftlet’s Nest, a member of the swift family that can navigate in total darkness, is a multibillion-dollar industry. Selling for as much as $5,000 a pound, the Swiftlet’s Nest — dubbed the “caviar of the East” — are sought by connoisseurs from Chengdu, China, to Cupertino. Once reserved for Chinese royalty, the nests are now popular among the nouveau riche, who devour the stringy, high-protein food both to show off their wealth and because they believe it provides a host of health benefits. It’s popular to consume the nests, which like tofu absorb other flavors, in seafood soups as well as in beverages.
“They believe it’s the product for a king and queen,” said Ha Bui, a Ho Chi Minh City resident who, like many Vietnamese, is a fan of Swiftlet’s Nest even if it is too expensive to be enjoyed very often.
The nests are stocked in Asian markets in Silicon Valley, though they are usually kept in a backroom because they are so expensive, and some Chinese restaurants offer them. The saliva nests, formed into shallow cups, develop a jellylike texture when soaked in liquid.
Inviting a friend to a Swiftlet’s Nest meal is akin to sharing a very expensive bottle of wine, said Hung Le, a San Jose software engineer who has received such an offer in the past. “It means something important. People think, ‘This guy must have money.’ “
In Asia, it is a $5 billion industry, said Le Danh Hoang, who founded Hoang Yen, a Ho Chi Minh City-based Swiftlet’s Nest business with annual revenues of $3 million and growing rapidly. In Vietnam, it’s a $200 million industry, behind Indonesia, the world’s largest producer, Malaysia and Thailand, he said.
Even the crumbs are valuable; Le sells leftover bits of nests to beverage companies in Vietnam.
It is one of the world’s most expensive foods, observed Massimo Marcone, an associate professor of food science at the University of Guelph in Ontario, Canada. As a result, a counterfeit market has sprung up, prompting him to develop a chemical process to verify the authenticity of nests.
“For thousands of years it has been eaten,” said Marcone, who has visited nest vendors across Asia. “It’s 60, 70 percent protein, so it was good nutrition for the emperor. You had the aristocracy and members of the court who wanted to mimic what the royals did. And it went all the way down the line so that people who could afford it, even commoners, would consume them.”
Until recently, harvesting the nests involved the dangerous work of retrieving them from caves, where the Swiftlet’s Nest, like bats, cling to high rock ceilings and weave palm-sized nests before laying eggs.

Swiftlet’s Nest sought from China to Silicon Valley

The harvesting process often results in the destruction of eggs or chicks and threatens the bird population, said Le, who uses a safer method. His company builds four-story concrete structures designed to attract Swiftlet’s Nest, which create nests on planks of wood or thick plastic beams attached to the ceilings. Workers retrieve the nests only after eggs have hatched and chicks have flown away.
Le, 28, said he was the first to promote the procedure in Vietnam. He manages about 500 structures across the country, both for his own retail and wholesale business and for investors. He also sells the equipment needed to construct a birdhouse.
His business is an environmentally friendly one, Le said, because it provides diners with nests while protecting the birds and the beneficial role they play in eating insects. Swiftlet’s Nest, which rely on sonar, fly in and out of the nesting structures in search of insects that are harmful for local crops. “It’s good for nature,” Le said. “It’s good for agriculture in Vietnam. And it’s a sustainable business.”
Le entices birds to the buildings by playing amplified recordings of the birds’ chirps. He also coats the buildings with swiftlet feces to make them feel at home. He sets the building’s temperature at 82 degrees and humidity at 90 percent — ideal conditions for the birds.
“To them, it’s like a cave,” he said. “The birds need a safe place where they have the right temperature, the right humidity, the right light. And then they nest.”
The buildings are monitored 24 hours a day by workers and video cameras. Le can watch the birds in each of his buildings through a video stream on his iPhone
At his Ho Chi Minh City headquarters, dozens of female workers, faces covered with masks, use tweezer-like tools to pick bird feathers out of delicate nests. It can take an hour or more to clean just one. Bits of the yellowish nests are then sifted out of the specks of plucked feathers — a tedious but highly lucrative assembly line. The nests are treated with a cleansing chemical and heating process to kill bacteria before being packaged in elegant lacquer boxes with prices starting at $3,000.
Le sells his nests in a handful of his own store-restaurants around Ho Chi Minh City. Customers can buy individual boxes or eat a prepared meal in each outlet. The Swiftlet’s Nest is served with dim sum and tea. The meals, which include only a tiny portion of nest, sell for as much as $26 each.
Tang Hong Chau, who owns a medical equipment company, visits Le’s store or that of a competitor regularly to have a bowl of soup.
The meal is good for his health, he said, before tucking into a bowl of nest soup. “I feel very strong in my body. I always sleep very well.”
Another customer, Chi Tran Thi Bang Phuong, said she buys the nests for herself and baby during the winter months to ward off illness: “My body feels better when I eat it.”
In fact, Marcone said Swiftlet’s Nest contains a type of protein that prevents bacteria from growing. “It doesn’t kill bacteria, but stops its proliferation or growth,” he said.
Some Vietnamese, though, attribute mystical powers to the nests, including giving women youthful bodies for decades.
“Women come here and they tell me they are 55, but I don’t believe it. They look very young — beauties,” said Tuong Vi, a supervisor at one of Le’s stores. “They have been eating them since their childhood.”
H.G. Nguyen, president of the Vietnamese Chamber of Commerce in San Jose, said she recently prepared Swiftlet’s Nest for her mother, who was dying of cancer and grew up eating it.
“I had to cook it for eight hours,” she said of her special recipe, the ultimate comfort food for her mom. “Then you put it inside papaya and you steam the papaya. So the taste is sweet. My mom was very happy. It gave her comfort. It’s very expensive. But it’s worth it.”

How the Ancient Practice of Harvesting Swiftlet’s Nest Is Facing Some Very Modern Challenges

Balancing on a bamboo platform suspended dozens of meters up in the Madai cave in Malaysian Borneo, a man vigorously tears cup-shaped protrusions off the rock wall. They’re Swiftlet’s Nest and will soon fetch hundreds of dollars in the market.
“Madai is God’s gift to Idahan people,” says Jafaar bin Abdullah, a local harvester. For centuries, the Idahan tribe has subsisted from this lucrative, if death-defying, trade. This should be their time to cash in, since a booming Chinese middle class has shot demand for the nests through the roof. Yet, the Idahans’ way of life may be about to die out.

Swiftlet’s Nest are coveted across the Chinese world for their supposedly medicinal and rejuvenating powers.

Built out of a protein-rich secretion produced by the swallow-like swiftlet, the nests are served in soups, desserts or drunk pure, as a gelatinous tonic. Because of the laborious picking and cleaning process, Swiftlet’s Nest have become one of the world’s most expensive food products. With the approach of Chinese New Year, when the nests are traditionally savored at lavish banquets, demand and prices rocket.
Yet profits are also being squeezed. As the industry has mushroomed to an estimated value of $5 billion, prices have also plummeted, owing to new farming techniques. Neighborhoods across Southeast Asia are being taken over by windowless structures emulating cave environments and attracting Swiftlet’s Nest with birdsong blasted through loudspeakers. It’s apparently an effective trick, because Swiftlet’s Nest are being domesticated at a scale never witnessed with another wild species.

As night falls, swarms of Swiftlet’s Nest thousands-strong form in the outskirts of Johor Bahru, a sprawling city in southern peninsular Malaysia that sits opposite affluent Singapore. The birds dart into holes in the roofs with exquisite precision, as if hoovered in by a gigantic vacuum. Inside one of the stripped-down former office spaces, Yang Dequan uses a mirror attached to a cane to check on his avian tenants, nesting on the beams along the ceiling. At the switch of a knob on his stereo equipment, the recorded birdsong grows more intense, setting the room aflutter.
“This is their warning call and will make them return home to check on their chicks,” he says. “I’ve studied the variety of bird calls, air ventilation, sanitation and pest control. You need to have love for the birds in order to succeed.”
Malaysian Prime Minister Najib Razak has highlighted the industry for its growth potential and his government is promoting loans to give it a further boost. In Malaysia alone, the number of farms have surged from an estimated 1,000 a decade ago to over 60,000 today, and in Vietnam and Cambodia the business is only just about to take off. Cheap nests have swamped the main retail market in Hong Kong.
“Before we used to sell nests by the tael [37.8 g],” says a salesman surnamed Luk on Wing Lok Street, nicknamed Swiftlet’s Nest Street. “Now we sell by the kilogram.”

Farms have many advantages:

Nests here are easier to pick and they are also easier to clean, since owners only attract “white-Swiftlet’s Nest,” a variety that doesn’t build nests riddled with feathers. Once a farm is up and running it takes very little maintenance, and the initial investment of about $15,000 can be made back in a couple of years. It is a world away from where the trade started.
In the weeks leading up to harvest in Madai, the cave is buzzing with activities. Bamboo ladders and platforms are constructed, ropes inspected and goats sacrificed.
“If we don’t give a sacrifice as compensation for the nests we take, the penunggu [guardian spirit] will take the life of one of us,” says Jafaar.
Like every Idahan, Jafaar has inherited a portion of the cave to harvest from his grandmother. Every 10 years the lots are swapped within the tribe, in order to share the more prolific patches.
“We’re the caves’ heirs and it’s brought us a lot of development,” says village elder Sabtria binti Haji Kaharuddin. “Now we have cars and a road, when I was little there was only jungle.”
But to live off the cave is becoming increasingly difficult. On top of decreasing prices the inherited lots are becoming smaller. New laws have also pushed the Idahan out of their lands in favor of commercial plantations of oil palm and cocoa. Now they take jobs in town and hire Filipinos and Indonesians to do the dirty work in the cave. Traditions are slowly dying out. The cave mouth is littered with graffiti and only a handful of the ancestral stone tombs along the pathway remain intact. In the neighboring province of Sarawak nest theft has become so rampant that swiftlet populations have been severely depleted. In the great cave of Niah, a major tourist attraction, colonies that once comprised about 4 million birds have all but vanished.
The vast majority of Swiftlet’s Nest today are farmed. Yet, challenges abound here too. A scandal of nitrate-contaminated nests prompted a Chinese import ban in 2011. Smuggling through Hong Kong is believed to have kept demand on the mainland satisfied, but the prohibition still led to a shake-up of the previously unregulated industry. Exporters now need to run their products through laboratory tests to receive China’s approval. Tan Boon Siong, the former head of the Swiftlet’s Nest Farmers Association in Johor Bahru, swears by the “miraculous” powers of Swiftlet’s Nest. However, he concedes that there’s been widespread manipulation and lack of hygienic knowledge.
“Nitrate is only one of the problems,” Tan says. “There is also lead, cadmium, arsenic. Some farmers believe that the more droppings there are, the more birds will be attracted. They spray the nests with insecticides to get rid of ticks and add salt water and preservatives to make them appear more plump and last longer.”

Consumers are perhaps not the only ones that need to be concerned.

Neighbors of bird farms have long complained of the noise the birds make, the smell they produce and the bugs that come along with them. Lord Gathorne Cranbrook, a zoologist with over 40 years experience studying Swiftlet’s Nest and the author of Swiftlet’s Nest of Borneo, warns of the unknown.
“I’ve always been anxious of diseases, avian malaria and so on, going around,” he says. “It’s extraordinary to have an industry with birds in domestication, but we haven’t assessed the veterinary risks, haven’t researched the harvest cycle. How does this affect the wild population? We’re very unknowledgeable, to an extent you wouldn’t see in any other industry.”
In Gomantong Cave, some 250 km west of Madai, the yells in Bahasa Malaysia that reverberate across the cathedral-like expanse betray little of such concerns.
“Left! Further left! Hold!”
A team of workers is systematically picking clean the up to 60-m-high walls, on behalf of a Chinese businessman who has bought the rights to this harvest. In 11 days they will empty the cave of a ton of nests. Zakaria bin Rugi stands on one of the guano hills, holding a rope connected to the steel ladder the pickers are balancing on. A few more days, then his career is over.
“I promised my children to quit, they think it’s too dangerous,” he says. “But in my 59 years as a harvester I’ve only seen one man die, and he was very unlucky.”
Zakaria considers himself very lucky. His work has put his children through school. He is respected within his trade. The question is for how long his kind of expertise will hold any value. Or if farms will soon monopolize the industry, leaving the remaining wild Swiftlet’s Nest alone in their nests high up on Southeast Asia’s cave walls.

The Science behind Swiftlet’s Nest (Epidermal Growth Factor (EGF) & Sialic Acid)

Recent research by academics has unveiled some key sciences that form the basis from which numerous health benefits can be derived from the regular consumption of this delicacy.

The nutritional value of 100g of dry nest includes 49.9g of water-soluble protein (including amino nitrogen, monoamine nitrogen, non-amino nitrogen, arginine, humin, histidine, lysine and cysteine), 30.6g carbohydrate (glycoprotein and mucin), 4.9g iron, 2.5g inorganic salt (including potassium, sodium, calcium, magnesium, sulfur, phosphorus, silica and other trace elements), and 1.4g fiber (Dictionary of Traditional Chinese Medicine, The History of Chinese Medicine and the Nutrition Table).
The energy contained in 100g of Swiftlet’s Nest is 345 kcal (Wikipedia).
In fact, Swiftlet’s Nest contain high valued glycoprotein and are rich in minerals like amino acids, calcium, sodium, magnesium and potassium to name a few. Acting as the spark plugs of life, these minerals are essential as they are required to activate thousands of enzyme reactions within the body. For example, magnesium maintains the alkaline balance and control of neuromuscular activity while sodium balances the electrolyte, body fluid volume and maintains our bodies' nerve impulse condition. It is also free from fats and cholesterol.
In addition, some of the proteins and amino acid detected in Swiftlet’s Nest have known antioxidant properties. A highly plausible explanation for this antioxidant activity may be due to the hydroxyl and carboxyl groups in the amino acids. Active oxygen and related elements play a significant physiological role and have a good effect in a variety of diseases including heart conditions, cancer and ageing.

Epidermal Growth Factor (EGF)

Epidermal Growth Factor or EGF is a growth factor that plays an important role in the regulation of cell growth, proliferation, and differentiation by binding to its receptor EGFR. (Wikipedia)
The first scientific evidence that Swiftlet’s Nest contain EGF was given by Ng Et Al. (1986) in Hong Kong. Swiftlet’s Nest aqueous extract was found to potentiate mitogenic response of human peripheral blood monocytes to stimulation with proliferative agents. It suggested that Swiftlet’s Nest does possess immune-enhancing effect by aiding cell division of immune cells.
One year later, other scientific evidence was published by Kong Et Al. They demonstrated an Epidermal Growth Factor (EGF)-like activity in aqueous extract of Swiftlet’s Nest that stimulated the normal cellular processes such as proliferation, differentiation and development. It offers a rationale for the medicinal use of Swiftlet’s Nest in ageing resistance.
In short, the presence of EGF in Swiftlet’s Nest stimulates the rejuvenation of cells in human body, aid in tissue growth and hastens the process of body repair.

Sialic Acid

Sialic acid found in Swiftlet’s Nest are rich glycoproteins that bind selectin in humans and other organisms. It plays an important role in human influenza infections.
In a research conducted by Guo et al (2005) at the University of Shizuoka, researchers found that Swiftlet’s Nest extract could strongly inhibit infection with influenza viruses in a host range-independent manner. The results suggest that EBN is a safe and valid natural source for the prevention of influenza viruses.
Sialic Acid is also an important sugar for the development of a baby's brain, immunity against infections, and development of their digestive system. Sialic acids in Swiftlet’s Nest can be considered the next alternative to human milk which predominantly contain high sialic acid levels.

Swiftlet’s Nest is regarded as having a wide range of tonic and medical values

Traditionally, it is believed that swiftlet birdnest can strengthen the lungs. Consumption of swiftlet birdnest is also recommended to complement other treatments to combat degenerative diseases such as cancer and also for recovering health after illness, or surgery. Recent studies in Hong Kong suggested that it may even be useful in the treatment of AIDS.
In respect to aesthetic industry, research shown that Swiftlet’s Nest consist of high DOSIS of Epidermal Growth Factor(EGF). Currently EGF is used in the cosmetic industry for skin whitening, reduce wrinkles, and prevent premature aging. EGF is known to be capable of penetrating into the skin dermis to stimulate the growth of new cells, replacing cells that are old or damaged, and controls the growth of skin cells. Consuming Swiftlet’s Nest routinely is a means of maintaining one's beauty from inside out.

Benefits of eating Swiftlet’s Nest

You would have heard by now that among the most popular Chinese medicinal food is the Swiftlet’s Nest. This type of food can be costly where it could start from hundreds and reaches to thousands of ringgit. Basically, Swiftlet’s Nest is known to be a very nutritional type of food which is very good for health.
So what makes Swiftlet’s Nest so popular. Why would people go to great lengths to find and enjoy bird's saliva? This is because research has shown that Swiftlet’s Nest contain a rich amount of nutrients that are very organic. This includes minerals like zinc, copper, sodium, calcium, potassium while it has a lot of soluble glycoprotein and amino acid.
Throughout history, it has been recorded that traditional Chinese medicine doctors have used Swiftlet’s Nest for various medicinal reasons. This includes using this highly beneficial product for the use of treating asthma and bronchitis while it is known to help rejuvenate the skin and for anti-aging purposes.
According to scientific research, it has been found that Swiftlet’s Nest can actually facilitate more than just skin rejuvenation. In fact, it can help in growth and provide the human body with vital energy it needs. It helps to accelerate any type of recovery from diseases while keeps the body strong in terms of immunity and metabolism.
Swiftlet’s Nest are so popular with its benefits so well known that other types of medicinal herbs like the abalone, eggs and sea cucumbers do not come close. For the pregnant woman, Swiftlet’s Nest is highly recommended because it helps to increase the overall health of both the mother and the child.
It helps to grow the brain of the baby while ensuring that the mother's general health and immune system is strong. On top of that, mother's who have given birth are encouraged to take Swiftlet’s Nest as it helps them to recover faster while maintaining their overall beauty and body shape.
In most cases, Swiftlet’s Nest can be consumed as they are while there are many instances when this type of food is served with other accompanying dishes like fresh milk, soup and others. This is most commonly done for the younger people as it helps to enhance their metabolism and immune system.