Fig. 2.

Comparison of genetic diversity among species differing in conservation status. (a) Crossoptilon mantchuricum exhibits lowest level of genetic diversity among bird species based on available estimates from genome-wide sequencing data. Genetic diversity was measured as proportion of heterozygous SNPs per base pair and plotted in rank order for 23 bird species including C. auritum and C. mantchuricum (bold text and asterisk). Colored bars indicate 2020 IUCN Red List threatened species status. References for each species provided in supplementary data set S2, Supplementary Material online. (b) Nucleotide diversity in 100-kb windows with 25-kb step size across chromosomes. Number under abbreviated name indicates average nucleotide diversity marked by dotted line.