Distribution of the length and base coverage of the Paradoxornis webbianus bulomachus contigs produced through reference and de novo assemblies. A. Distribution of contig length: contig lengths tended to be longer than 1000 bp with reference-based assembly and shorter than 1000 bp with de novo assembly. B. Distribution of base coverage: base coverage of contigs was generally in the range 10 ~ 100X in both assemblies.