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Model performance in anticipating the geographic distribution of independent latitude (left) and longitude (right) records using the principal component axes.

<p>Blue dots were sites used to calibrate the niche model, black crosses indicate independent testing records (inner panels), dark red suggests high suitability.</p

Final suitability model predictions for H7N9 across eastern China using principal components (top row) and the bioNDVI dataset (bottom row).

<p>Right-hand panels show greater detail for the areas indicated in the left-hand panels; dark red indicates zones of high suitability.</p

Visualization of year-round trends in MODIS NDVI greenness indices in modeled unsuitable (top) and suitable (bottom) areas for H7N9 virus based on a 10% omission threshold.

<p>Visualization of year-round trends in MODIS NDVI greenness indices in modeled unsuitable (top) and suitable (bottom) areas for H7N9 virus based on a 10% omission threshold.</p