from Chapter II of Spatial Analysis of Ecological Factors Related to Grasshopper Population Dynamics in Wyoming
Fig. 9. Spatial distribution of rangeland grasshopper outbreaks during 1968-1969, when infestation area decreased by 92.6% from the previous year (dark shading = uninfested area; blue = area infested in 1968 only; yellow = area infested in 1969 only; green = area infested both years; black = state and county borders).
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