Grasshoppers of Wyoming and the West

Entomology

Wyoming Grasshopper Population Dynamics Maps

Infestation expansion 1973-74 map

from Chapter II of Spatial Analysis of Ecological Factors Related to Grasshopper Population Dynamics in Wyoming

Fig. 15. Spatial distribution of rangeland grasshopper outbreaks during 1973-1974, when the infestation area increased by at least 340.6% over the previous year (dark shading = uninfested area; yellow = area infested in 1973 only; blue = area infested in 1974 only; green = area infested both years; black = state and county borders).

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