Fig. 2

Temporal dynamics of psittacosis notifications from 2000 to 2015 in the Netherlands. a Time series of psittacosis notifications plotted on monthly basis. b Wavelet power spectra of the psittacosis notifications. Color codes represent wavelet power and areas inside the black contour lines correspond to 95% confidence regions where the power is higher than the power of red noise with the same autocorrelation coefficient as the data. Transparent areas on the left and right hand sides of the plots represent the cone of influence, which is a region where edge effects are important