Illustrates the sequential stages involved in the process of swiftlet nest production and breeding, leading up to the point where the nests are considered suitable for harvesting: A. The process of collecting swiftlet nests through gentle tapping. B. Eggs laid by swiftlets. C. Recently hatched swiftlet offspring. D. Swiftlet chicks at the age of 10 days. E. Swiftlet chicks at the age of 17 days. F. Swiftlet chicks aged between 21 and 30 days. G, H. The swiftlet offspring have reached the stage of development when they are capable of flight. Additionally, the swiftlet nests have reached a state of readiness where they may be collected for harvesting.