Fig. 2
From: Identifying key bird species and geographical hotspots of avian influenza A (H7N9) virus in China
The results of CCF analysis for each bird species with respect to Influenza A (H7N9) cases in Shanghai and other five provinces. The values of correlation coefficients greater than or equal to 0.27 are shown in different colours. Bird species with positive lags Lag ≤ 10 are demonstrated in x-axis for each municipality/province, where the lags are measured by weeks