Fig. 4From: The impact of migratory flyways on the spread of avian influenza virus in North AmericaPatterns of migration rates across localities. Plots of migration rates inferred for the PB1, PA, NP, and MP gene segments on a two-dimensional matrix where each cell represent a rate between two locations. Each cell is color-coded according to the migration rate between the locations. The matrix is symmetric and location labels on the x- and y-axis are ordered so that locations belonging to the same flyway are next to each otherBack to article page