The bars show assignments of individuals to populations as suggested by the STRUCTURE analysis for A) pied flycatcher populations and B) collared flycatcher populations. The three panels for each species represent results from independent runs with K = 2 (top), K = 3 (middle) and K = 4 (bottom). One vertical bar represents one individual and the proportional assignment of each individual to a specific population is coded by color. The population origin of the samples is specified below bars.
Backström et al. BMC Evolutionary Biology 2013 13:2 doi:10.1186/1471-2148-13-2