from Chapter II of Spatial Analysis of Ecological Factors Related to Grasshopper Population Dynamics in Wyoming
Fig. 14. Spatial distribution of rangeland grasshopper outbreaks during 1971-1972, when the infestation area increased by 228.4% over the previous year (dark shading = uninfested area; yellow = area infested in 1971 only; blue = area infested in 1972 only; green = area infested both years; black = state and county borders).
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