To be able to raise and harvest bird’s nest effectively, farmers need to know about the reproductive cycle of the bird’s nest. In addition, the biological characteristics of this bird need to be clearly explored.
Reproduction cycle of bird’s nest
According to Dr. Nguyen Thi Yen Nhi Yen, the total reproductive cycle of Yen is from 115 to 132 days. Thus, in a year, the bird will breed about 3 times.
Dr. Nguyen Thi Yen Nhi Head of Nutrition and Food Safety NUH – GMG Health. Former Permanent Secretary of the HCM City Nutrition Association, Center for Clinical Nutrition Research (CNRC) Singapore
The breeding process of bird’s nest
With each breeding cycle of Yen will take place a process: nesting, laying eggs, incubating eggs. When the breeding season comes, the bird nest will build a nest to prepare to lay and incubate eggs. The bird’s nesting process will take about 30 – 32 days. Nest nests with salivary glands under the tongue and 2 cheeks. At the time of the breeding season, the salivary gland of Yen will develop strongly to serve the nesting process.
With wild nest, after the baby bird of the first litter leaves the nest, the parents will use the old nest again. Each spawning, Yen will reinforce the old nest. Thus, the nest after each season will be thicker and more quality.
After the nest is completed, they begin to mate. The swiftlets usually mate at night with 2 timeframes: from 9:00 a.m. to 11:00 p.m. and from 1:00 to 3:00 a.m. One day they mate 3-4 times and will lay eggs 5-8 days after mating. After the first egg is laid, they can still mate 1-2 more times. However, after they have a second egg, they stop mating.
Each breeding season, the bird lays only 2 eggs
Each breeding time, the bird lays only 2 eggs. The second egg will lay 5 – 6 days after the first egg. Spawning time is from 2 a.m. to 6 a.m.
Immediately after laying the first egg, the mother and father took turns incubating them. During the incubation process, 1 will be responsible for incubating, the other will fly away to find prey. The mother and father take turns looking for prey and hatching eggs. During the incubation process, they use their beaks to stir the eggs. The mother or father will leave the nest 1-2 times a day at 8-10am. Leaving the nest is not only for prey but also to expose it to humid air, so that the young bird after hatching will not stick wings. At night, when the parent or mother is incubating, the other bird will stand in the nest. The parents and the mother take turns incubating the eggs about 4-5 times per night.
After incubation for 22-23 days, the first egg will hatch. And then about 2-3 days, the 2nd egg will also hatch.
Yen takes turns looking for prey for young birds
- The first day after the chicks hatch, the parents will not feed them immediately, but need to warm up by incubating them in the wings. After a day, the mother and father fly off together to feed the young birds.
- During the first 10 days, after the baby bird is eaten, the parents still need to warm for 1-2 hours. After 10 days, the parents only need to feed the young birds without incubating.
- During the first week, the baby bird will eat about 3 meals a day and increase to 4 meals in week 2. This time, the baby bird will only have a little fluff. By the third week, they eat up to 5 meals / week and have more fluff, and much darker hair. Week 4,5, bird’s nest will eat 6 meals / day. At this point, the baby bird has fully grown its feathers and begins to learn to fly.
- In the process of raising young birds, 2 birds often compete for each other’s food and have uneven growth. They will stay in the nest to eat and learn to fly. After about 47 – 51 days they will leave the nest depending on the development of each individual.
- After the chicks leave the nest, it is time for the parents to rest in preparation for the next breeding cycle.
Lure young birds and harvest the nest according to the reproductive cycle
Based on this cycle to know when to lure the young birds and harvest the nests
Bird’s nest often builds nests in late autumn. The breeding season is in the right rainy season when the amount of insects is the most, will help the nest easily find prey. Thus, the season of young birds will appear much in the months of: 3,4,8,11. If building the Yen house, it is necessary to build at least 1 month in advance at these times to be able to welcome the new nest to come to nest.
Harvesting Salanganes’Nest is only carried out when the young nests are clear. Absolutely do not exploit nests at the time when young birds are young and incubating eggs. Because if harvesting the nests at this time will reduce the number of nests very quickly, affecting the natural development of the nests. Best harvest time in months: 3,4,8,9,11 and 12.
Address to buy prestigious Khanh Hoa Salanganes’Nest:
Website: Khanh Hoa Salanganes’Nest (yensaokhanhhoa.vn)
Address: Ninh Van Bay, Ninh Hoa commune, Nha Trang city, Khanh Hoa province