Figure 1
From: The impact of West Nile virus on the abundance of selected North American birds
Annual BBS counts of six species of birds on ten states and annual WNNID reports, by state. The color of the lines that connect counts indicates bird species: AMC = American Crows; AMR = American Robins; HSP = House Sparrows; NC = Northern Cardinals; BJ = Blue Jays; MOD = Mourning Doves. The tick mark on the secondary y-axis indicates the maximum annual incidence per 1,000,000 of WNNID in a state (red bars).