The Edible-nest Swiftlet (Collocalia&ciphaga) has beenreceiving more attention lately due to the fact that this birdproduce an edible nests which fetch a high value in the international market. The original nesting habitat of this species islimestone caves. Since approximately a hundred year ago,people of Java has been successfully farmed the swiftlets inhouses which managed in such a way to resemble natural cavehabitat (Mardiastuti, 1996).There has been no previous study on the breeding ecologyof the Edible-nest Swiftlet in Indonesia, either in natural cavehabitats or in man-made nesting habitat. This paper aims toreveal the breeding success of the species and investigate thepossible causes of the breeding failure in swiftlet houses.
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