Swiftlet / Black-Nest / Edible-Nest / White-Nest (Aerodramus maximus / Aerodramus fuciphagus)
Order: Apodiformes, Family: Apodidae
The swiftlet is a cave-dwelling bird.
It is dull brown or gray in color, and paler on the rump and underpart. Swiftlets grow to be 3 1/2 to 6 inches long (the size of a sparrow), and weigh about half an ounce.
Swiftlets fly lower, more slowly and more erratically than most swifts. They are small swifts, a family superficially similar to swallows, but with longer, more slender, scythe-like wings.
I. DESCRIPTION:
- The swiftlet is a cave-dwelling bird.
- It is dull brown or gray in color, and paler on the rump and underpart. Swiftlets grow to be 3 1/2 to 6 inches long (the size of a sparrow), and weigh about half an ounce.
- Swiftlets fly lower, more slowly and more erratically than most swifts. They are small swifts, a family superficially similar to swallows, but with longer, more slender, scythe-like wings.
II. GEOGRAPHICAL RANGE AND HABITAT:
- Swiftlets inhabit Southeast Asia and the Indian subcontinent.
- The live mostly in mountain or coastal caves, and sometimes open areas and towns.
III. DIET:
- Swiftlets eat flying insects, which they catch in midair.
IV. LIFE CYCLE/SOCIAL STRUCTURE:
- Colonies may contain up to a million birds.
- Swiftlets breed in caves.
- During breeding season, a swiftlet's salivary glands enlarge enormously, enabling the bird to produce the saliva that binds the nest, which takes approximately two months to construct and usually holds one egg.
V. SPECIAL NOTES/ADAPTATIONS:
- Cave-dwelling swiftlets are the only birds to use sonar in maneuvering through darkness. Its sonar consists of clicking sounds at frequencies of 1,500 to 5,500 hertz — audible to the human ear. The sounds are emitted at the rate of about six per second. (Swiftlets are the only true avian troglodytes — cave dwellers.) Not only can they navigate in total darkness, but they can find their own individual nest among hundreds of others.
- A swiftlet nest resembles a small bracket, sometimes containing bits of fern or bark. The male regurgitates a long, thin gelatinous strand from salivary glands under its tongue, which is then wound into a half-cup nest and bonds like quick-drying cement to the inside of a cave wall.
VI. EFFECT ON HABITAT:
- Guano deposited by swiftlets (and many species of bats) gives rise to a whole community of insects that draw energy from the guano and the corpses of the flying animals.
VII. POPULATION STATUS:
- The rising price and demand for swiftlet nests for "bird's nest soup" has resulted in a decline in the swiftlet population. In most nest-producing countries, swiftlet colonies are dwindling. It is argued that if harvesting continues at its current rate, the species may die out in five to 10 years. Since 1934, an ordinance in Sarawak permits the nests to be harvested only every 75 days. Similarly, in Sabah, only two harvests per year of the white-nest swiftlets are allowed.
VIII. SUBSPECIES:
- The edible-nest swiftlet is also known as the white-nest swiftlet and the brown-rumped swiftlet. Its whitish-yellow nest is bound almost exclusively by saliva.
- The black-nest swiftlet is larger than its 2-inch-deep, "half-saucer"-shaped nest — when it sits in the nest, it faces the cave wall, while its tail and long, folded wings stick out into the air. Its nest is made with saliva and feathers.
Related Content
 by David Rennie An army of 700,000 specially trained ducks and chickens has been mobilised to help fight China's biggest locust plague in 25 years. The birds, which are taught to pursue and eat locusts at the sound of a whistle, are part of a national campaign that includes 280,000 people backed by crop-dusting planes and special locust-killing micro-organisms imported from Britain. Swarms of locusts have d...
|
 The hornbill is a big, spectacular bird with a massive "double-story" bill consisting of a long, deep beak with a projection (known as a casque) on top.
Hornbills usually have large heads, thin necks, broad wings and long tail feathers.
There are 46 species of hornbill in Borneo, with the four most prominent being the black, pied, rhinoceros and wreathed hornbills.
All are basically blac...
|
 A man found an eagle's egg and put it in a nest of a barnyard hen. The eaglet hatched with the brood of chicks and grew up with them. All his life the eagle did what the barnyard chicks did, thinking he was a barnyard chicken. He scratched the earth for worms and insects. He clucked and cackled. And he would thrash his wings and fly a few feet into the air. Years passed and the eagle gre...
|
 Family: Alcidae The puffin's most striking feature is its large, brightly colored bill.
Early sailors dubbed the puffin the "sea parrot" because of its stout body, short wings, and orange or red webbed feet, which are placed far back on its body.
Males and females have the exact same markings. It's unknown whether this confuses the birds, but it certainly confuses bird-watchers.
During the summer...
|
 Order: Psittaciformes, Family: Psittacids Hyacinth macaws grow to approximately 33 to 40 inches in length, and weigh about 3 pounds. Their wingspan measures 46 to 50 inches and their tail 21 inches.
The hyacinth has violet-blue plumage with a deeper shade on its wings. The underside of its wings and tail feathers are blackish-blue. It has a black beak and dark brown iris a with yellow circle of skin around the eyes. A yellow line lies...
|
 Order: Falconiformes, Family: Accipitridae Snail Kites can be found in both South and Central America. Some are also found in Mexico and Cuba. The United States also has a small population concentrated in Florida.
Mass: 340 to 567 g.
Snail kites are medium-sized hawks, weighing from 12-20 oz. They are about 14-16 inches long and have a wingspan of 43-36 inches. The females are very slightly smaller than the male.
|
|
Add Feedback