Fig. 1

a Numbers of animal samples from various provinces. The numbers of the 3,055 samples belonging to the 55 species of eight families identified are indicated by a pie chart for each province. The numbers of samples from the 55 species and the provinces and dates of collection are detailed in Additional file 1: Table S1. b The prevalence diagram of each viral family related to province, animal species, and reads number. The X axis represents how many provinces certain viral family presents; the Y axis represents how many animal species certain viral family presents; and the sizes of these circles represent the sizes of reads numbers of viral families. c Heatmap based on the normalized sequence reads of 23 families of mammalian viruses in each pooled sample. The species are listed in the right text column. Location information is provided in the life text column. The names of the mammalian viral families are presented in the top text row. The boxes colored from green to red represent the viral reads, which were normalized by average viral genome size and total sequencing reads in each pool