Edible Bird Nests are
classified according to the location where the nests are built, edibility,
external features, colour, quality and cleanliness and they can basically be
classified into two main categories:
• Cave Edible Bird Nest: (including whole cave Edible Bird Nest pieces,
cave Hydrochous Gigas and Collacalia Maxima)
Cave Edible Bird Nest refers to the nests built by swiftlets in natural
stone walls or limestone caves. These Edible Bird Nests absorb lots of minerals
and they are usually beige or yellow in colour and they are more solid. They
contain more fine feathers compared to house Edible Bird Nests and contain more
impurities. They expand 2-3 times upon soaking and require longer soaking time.
They are delicious after stewing, taste better and can be stewed for longer
hours.
• House Edible Bird Nest: (including common white Edible Bird Nest pieces
and house Hydrochous Gigas Edible Bird Nest)
House Edible Bird Nest built in swift houses and used by swifts for nesting.
Swiftlets build their nests on the beams and walls in these houses, resulting
in a slight taste of sawdust in such Edible Bird Nests. Houses used by
swiftlets to build nests are known as swift houses. Workers check the Edible
Bird Nests on a regular basis and will only harvest them when the time is
right. As Edible Bird Nests are covered with feathers and other impurities, it
is necessary to send them for cleansing at the Edible Bird Nest factory where
feathers and other impurities are removed. House Edible Bird Nests are higher
in quality, with less feathers and less impurities. They expand better in water
and on the average, they expand 5 to 7 times their original size. They taste
smoother but they cannot be stewed for long hours. They are normally stewed for
30-45 minutes before they are ready to be served. If stewing exceeds such
periods (more than 1-2 hours), the Edible Bird Nest will dissolve in water and
disappear.![]() |
| About Edible Bird Nest - Types of Edible Bird Nests |
*Whether it is house Edible Bird Nest or cave Edible Bird Nest, they are nests built by Collocalia ciphaga swiftlets and their nutritional value is almost at par.
• Edibility
Swiftlets normally use twigs, straws and earth to build their nests and
there are no edible contents. There are only three major types of Edible Bird
Nests and the purity in protein contents and nutritional value of the saliva
secreted by Collocalia ciphaga swiftlets is the highest.
• Collocalia ciphaga Edible Bird Nest {Official Edible Bird Nest}:
Collocalia ciphaga Edible Bird Nest means Edible Bird Nests built with pure
saliva of swiftlets, with minimum impurities, in strips, with high affinity for
water, able to expand 7-8 times and is the best quality Edible Bird Nest. They
are usually white, yellow, red or grey in colour.
• Collacalia Maximus Edible Bird Nest:
Collacalia Maximus is a type of cave swiftlet and they have less saliva.
They build their nests using feathers mixed with saliva and they are lighter in
colour, usually white or yellow.Collacalia Maximus Edible Bird Nest require more processing. The nests must be broken up and soaked in water before feathers and impurities are removed. They are then made into Edible Bird Nest strips, Edible Bird Nest balls and Edible Bird Nest biscuits.
As it requires more processing, their nutritional value and price are lower than Collocalia ciphaga Edible Bird Nests. Collacalia Maximus Edible Bird Nests also have a lower water affinity compared to Collocalia ciphaga Edible Bird Nests, thus they do not expand so much.
• Hydrochous Gigas Edible Bird Nest:
Hydrochous Gigas Edible Bird Nest may be divided into house Hydrochous Gigas
Edible Bird Nest and cave Hydrochous Gigas Edible Bird Nest. They are mostly
found along the coastal regions. From their name (in Chinese), we know that
Hydrochous Gigas swiftlets use their saliva and straws to build their nests,
and that is why these Edible Bird Nests contain pieces of straws. Hydrochous
Gigas Edible Bird Nests come from swiftlets with specially sticky saliva. These
swiftlets love to use young straw and their saliva to build their nests. Their Edible
Bird Nests therefore are high in impurities and their Edible Bird Nest content
is the lowest among the three types of swiftlets and so is its price. They are
usually sold as broken Edible Bird Nest and Edible Bird Nest strips.
• External features and shape
They are principally divided into whole Edible Bird Nest pieces, narrow Edible
Bird Nest pieces, Edible Bird Nest corners, broken Edible Bird Nest, Edible
Bird Nest balls, Edible Bird Nest biscuits and Edible Bird Nest strips. Whole Edible
Bird Nest pieces refer to Edible Bird Nests which are intact after having
undergone cleansing.
• Whole piece Edible Bird Nest:
These are curved or boat-shaped Edible Bird Nest which has been selected
from the Edible Bird Nest harvested, with feathers removed, before they are
sold. As whole piece Edible Bird Nests are naturally obtained, their shapes and
sizes differ but these type of Edible Bird Nests are thicker than other types
of Edible Bird Nests. They also possess higher nutritional value, with better
flavor and better expandability when soaked. They are the cleanest among all Edible
Bird Nests and they have high expandability. If swiftlets built their nests on
the beams in swift houses, the Edible Bird Nests produced will be boat-shaped.
• Narrow Edible Bird Nest pieces:
These are whole piece Edible Bird Nests which have been accidentally broken
during harvesting and delivery or whole piece Edible Bird Nests which have been
cut into narrow strips or Edible Bird Nests which have been separated after
careful selection. Although they are not attractive physically, their quality
and method of preparation are similar to whole piece Edible Bird Nests.
• Edible Bird Nest corners:
They are the hardest portions at both ends of whole piece Edible Bird Nests
and they are the places where the concentration of saliva from swiftlets is the
highest. They require longer soaking time (six to eight hours) and Edible Bird
Nest corners are normally separated from whole piece Edible Bird Nests and
soaked separately. The Edible Bird Nest corners are usually torn into smaller
pieces prior to soaking so that they expand more easily. They expand more
compared to whole piece Edible Bird Nests and are more crispy.
• Broken Edible Bird Nests:
These are as a result of breakage during harvesting and transportation or
during the cleansing process and they are made up of small amounts of Edible
Bird Nest.
• Edible Bird Nest biscuit:
These are made from broken Edible Bird Nest during harvesting which have
been processed and compressed into different shapes (such as rhombus, sphere,
crescent and rectangular) and their quality is one grade below that of whole
piece Edible Bird Nests.
No Edible Bird Nest please, I can’t breathe: A look at some unusual allergies
People with food
allergy must steer clear of the food item as it can turn fatal
Avoid an allergic reaction
Having a fancy dish threaded with golden Edible Bird Nest may make most
people's eyes shine, but not for 39-year-old Grace Chung.Instead, she would poke and prod at her food to make sure there is none of the prized delicacy hidden somewhere.
Another person cannot exercise or exert himself within a few hours of eating shellfish.
These allergies, while uncommon, can cause unpleasant and even serious reactions in some people.
Last month, a 60-year-old woman who was allergic to prawns died after eating two pieces of prawn.
She had anaphylaxis, a severe reaction in which the immune system releases a flood of chemicals that can cause one to go into shock.
This causes the blood pressure to drop suddenly and the airways to narrow, possibly blocking breathing.
A month before that, a three- year-old boy with a relatively common peanut allergy had to be given anti-allergy medication on board a Singapore Airlines flight.
He was vomiting and could not speak properly when other passengers started opening their packets of peanuts that had been served as a snack.
Though it is rare for a peanut allergy to be so serious, the incident is a reminder of how people's innocent actions can really hurt someone who has a serious food allergy.
Most food allergies are caused by common products such as shellfish, milk, nuts and eggs. The best way to avoid an allergic reaction is to avoid these foods altogether.
Here is a look at some of the less common allergies.
EDIBLE BIRD NEST
Last year, Ms Grace Chung took a bite of a mooncake, saw streaks of white
jelly in it, and spat it out. It was a good thing the chief operating officer
of Gleneagles Hospital acted fast as she is allergic to Edible Bird Nest, a
costly delicacy used in the mooncake.It has been 29 years since she tasted Edible Bird Nest at the age of 10. "Until now, every restaurant that I go to, I will ask if Edible Bird Nest is on the menu," she said. "I even asked the roadside stalls that I went to in Bangkok."
When she first tried Edible Bird Nest, the premium item was not as common as now. "I got very excited and ate a whole bowl of it," said the 39-year-old. "Within five minutes, I felt breathless. I then had a choking feeling and was gasping for breath."
Ms Chung, who had childhood asthma, thought it was a very severe asthma attack. Her mother took her to the nearest hospital, where the staff gave Ms Chung medication, pumped out the Edible Bird Nest from her body and put her on oxygen.
It was not just her breathing that was affected. Her eyes were also swollen and she had rashes all over her body.
Yet, within the year, Ms Chung ate Edible Bird Nest again as her mother wanted to be sure it was indeed the culprit. "Mum bought it from another shop and gave me just one teaspoon. I had a similar reaction," she said. "I thought I was going to die. My mum took me to hospital in a cab. She was crying."
Ms Chung has since stayed away from Edible Bird Nest. Regarded as the caviar of the East, it is made of the saliva of the swallow-like swiftlet.
Edible Bird Nest allergies were once the most common cause of food-induced anaphylaxis in Singaporean children in the 1980s and 1990s, said Dr Elizabeth Tham, an associate consultant at the division of paediatric allergy, immunology and rheumatology at the National University Hospital.
Although it is no longer the case now, people with the allergy are still seen regularly, doctors said. Those with suspected reactions should stop eating Edible Bird Nest and seek medical help immediately, said Dr Tham.
"Patients with such allergies may develop swelling in the lips or eyes, hives and throat tightness, and have difficulty breathing or even faint."
Dr Tham said there was an eight-year-old who went to the hospital's emergency department after eating a bowl of Edible Bird Nest. Within minutes of eating it, he had hives, swelling in the eyes and lips, as well as wheezing and difficulty in breathing.
"He received an adrenaline injection and antihistamines and was admitted for observation," she said. A skin test later confirmed the allergy.
Some people who have food allergy may occasionally test to see if they still react badly to a particular food "to try and allow their body to get used to it", said Dr Tham.
"This is highly discouraged. It is very dangerous and may lead to life-threatening reactions," she added.









