Fig. 1
From: Genomic differentiation across the speciation continuum in three hummingbird species pairs
FST calculated in 100 kbp windows across the whole genome for three species pairs. Three pairs of hybridizing species have different divergence times (estimated by [51]): top (Selasphorus; 0.97 my), middle (Achilochus; 1.5 my), bottom (Calypte; 2.52 my). Chromosomes alternate in color. Z chromosome (right) has increased FST relative to autosomes for all three species pairs. Photograph credits: S. sasin by M. Shattock, CC-BY-SA 2.0; S. rufus by Kaaren Perry, CC-BY 2.0; A. colubris by Dick Ledbetter; A. alexandri by Bill Shreve; C. anna by Becky Matsubara, CC-BY 2.0; C. costae by Daniel Pierce