Bird's nest
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The Edible-nest Swiftlet (Aerodramus fuciphagus) is a small bird of the swift family which is found in South-east Asia. Its nest is entirely made of solidified saliva with little or no plant material. The nests are made by the males during a period of 35 days.Its diet consists of flying insects which are caught on the wing. Naturally these swiftlets breed in colonies in caves, in a cleft in a cliff or sometimes on a building.
The bracket-shaped nest is white and translucent and is made of layers of hardened saliva attached to the rock. It measures about 6 cm across with a depth of 1.5 cm and a weight of about 14 grams.
Average edible bird's nest contain about 62 per cent proteins including amino acids, about 27 per cent carbohydrate and a few per cent minerals, fat and moisture.
The most common nests have a white to grayish color. There are also more expensive yellow to orange and red colored nests (also called: red blood nests) marketed, which are harvested from limestone caves and the specific color is natural due to the environment. Red nests are thought to be more potent than then the yellow-orange and they should be more potent then the white ones.
Introduction
The edible bird's nest are made by the "South East Asia's swiftlets" (Aerodramus fuciphagus). These sparrows like birds construct their nest with glutinous strands of starched like saliva produced by a pair of large, salivary glands under their tongue.These very special kind of nests are found mostly in Hainan Island of China, Vietnam, Thailand, Myanmar, Peninsular Malaysia, Sumatra, Java, Borneo Island (consisting of Sarawak, Sabah, Brunei and Kalimantan) and the Philippines.
The collectors of bird's nest harvest about 5 times a year, but assure that the bird's can reproduce during the months February until July.
The traditional method of harvesting has not been able to keep up with the escalating demand for birds' nests, prompting some inventive technology. Concrete or wood nesting houses have been built along the sea coast, mostly in Thailand, Malaysia and Indonesia. \
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Photo: Edible birds nest just after harvesting. After collection comes the tedious process of cleaning the nests. They are soaked in water to soften the nest cement so that feathers and bits of dirt can be removed with tweezers. |
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Photo: Real white birds nest from premium quality after cleaning. |
Application
In some countries of Southeast Asia the edible nests are mainly consumed as a delicacy used in the preparation of soups and other dishes. The soup is made by soaking the nests in plenty of water. Then let it simmer for as long it takes for the bird's nest to dissolve completely. In this way it is also possible to brew a tea from it.It is said that cave nests are better as it takes up to three hours to double boil them while nests farmed in houses or other manmade structures take only 30 minutes.
Occasionally edible birds nest are used as food supplements. For this application either the dry nests are ground into powder or an extract is made from it.
Externally edible nest extracts are sometimes worked in cosmetics. Facial masks and beauty crèmes are sighted in the market.
Medicinal actions
Chinese medicine regards birds nest as possessing a sweet taste, mild in nature, neither cold nor hot, nourishes the meridian of the lungs, stomach and kidneys while possessing nourishing effects for better circulation of oxygen in the body. The therapeutic effects of birds nest has been recognized since ancient times and one would derive benefits without fear of dangers even when it is consumed in large quantities.According to traditional Chinese medicine, bird's nest imparts a youthful appearance, raises the libido, improves immune function, increases mental focus and treats respiratory ailments as well as digestive problems. It is also said that the nests promote healthy skin and strengthen the liver.
The most common reasons why Birds nests are taken are:
- Rejuvenating properties for body and skin;
- As an anti-oxidant with detoxifying effects;
- Improvement of immune system;
- For treatment of lung problems like bronchitis and asthma;
- In case of an upset stomage.
Industrial application
There are still no industrial application known of the Edible birds nest.Dosage
The optimum medicinal dosage of the edible birds nest has not been supported by any scientific research.Because it is such a costly ingredient, for therapeutic purposes most often 5-10 grams of dried whole birds nest (1-2 dry nests) are taken as soup or tea 2-4 times a week for as long as the complaints last.
For cosmetic purposes it is sufficient to use only 1-2 nests weekly.
Contra-indications
The use of Edible birds nest can generally be regarded as safe. Nevertheless one should make sure that the real bird's nests are obtained.- Edible birds nest should not be taken by children or adolescents, because of increased risk of food-induced anaphylaxis;
- Ovotransferrin is known to be responsible for egg allergies, and interestingly, very similar reactions have been seen in some young children after consuming bird's nest soup;
- There are fake nests in the market that can contain harm full ingredients;
- The red colour of the very expensive Red blood nests is sometimes artificially made by adding large amounts of sodium nitrite. Nitrite is a toxic substance that is highly carcinogenic.
More information / news
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