Abstract: Hatching success and post-natal stages of Dendrocygna javanica (Lesser Whistling Duck) were recorded from January 2007 to December 2007 at Paleik In in SinKaing Township, Mandalay division. Nests of D. javanica were observed among a variety of sites. All nests are nearly cup-shaped with a slight depression at the center. During the study period it was observed that 12 nests were constructed of twigs and broken dry leaves of Myet Mont Nyin grass (Carex pandanophylla), among the broken dry leaves of Myar grass (Cyperus spp.) and on the bending branches of Kyee tree (Barringtonia acutangular) at Paleik In. During the year 2007, 12 nests, 87 eggs and 49 hatchlings were observed in Paleik In. Among these nests 50% were recorded as successful, 25% as lost by predator, 16.67% were lost by flooding and 8.33% as abandoned. Of the 87 eggs observed, 49 eggs (56.32%) survived until hatching.