Location of the Monk Parakeet contact calls from each state on the first two canonical axes generated in the spectrographic cross-correlation–principal coordinates–MANOVA analysis. The canonical axes are a linear combination of the principal coordinates that maximally separate the call regions. The first canonical variate produces the best separation; the second canonical variate the next-best separation after the first variate's effects have been removed. The size of the circle represents the 95% confidence interval for the estimate of the mean centroid location.