Figure
1. Distribution and genetic structure of the Sporophila corvinasubspecies in Costa Rica and Panama. A) Typical male plumage per
subspecies, subspecies distributions highlighting contact zones between
subspecies (numbered), and known regions with intermediate individuals
(striped pattern). Map based on the distributions from Olson (1981) and
Stiles (1996). B) Estimated effective migration surface, dark orange
region along the continental divide represents a barrier of 100 times
reduced gene flow. C) Admixture proportion per individual, based on the
best result from ADMIXURE (K = 3).