Fig. 1: Genomic and morphometric analyses of the Eurasian nutcracker species complex.
From: Speciation and population divergence in a mutualistic seed dispersing bird
a Species range according to Madge et al.35 and Gill et al.34 with sampling locations (black dots) of N. caryocatactes (northern) (N = 17), N. caryocatactes (southern) (N = 8) and N. multipunctata (N = 3). Subspecies distributions are depicted in different colours according to the legend. b Principal component analysis based on 110,979 SNPs separated the data in three distinct clusters. c Population structuring based on admixture analysis for K ranging from 2 to 4. Cross-validation indicates K = 3 as the optimal number of clusters. d Species tree under the Multiple Species Coalescence model constructed from 192 nuclear genomic alignments of 1 Mbp. e Linear discriminant analysis of phenotypic variation among Eurasian nutcrackers based on an independent morphometric dataset of 90 museum specimens. Bird images by Jon Baldur Hlidberg, courtesy of the authors.
