Morphological traits taken for males and females of C. curvipennis lineages. Boxplots show the 10th, 25th, 50th (median), 75th, and 90th percentiles. Values above the 90th and below the 10th percentile are plotted as open circles. Illustrations correspond to C. c. curvipennis (A), C. c. excellens (B) and C. c. pampa (C) taken from the Handbook of the Birds of the World .
González et al. BMC Evolutionary Biology 2011 11:38 doi:10.1186/1471-2148-11-38