Two sex-linked fragments, XH0.6 and XH0.6RSM, were cloned in Oriental white stork (Ciconia boyciana) recently. XH0.6 only lies in the W chromosome specific to the female arid XH0.6RSM lies in the Z chromosome common to both sexes. PGR using a set of primer sequences from XH0.6, which differed several nucleotides from those in XH0.6RSM, amplified an about 300-bp genomic sequence only from the female C. boypiana. This method was applied successfully to identify the sex of individual young birds of C. boyciana...