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Fig. 3. Mean annual precipitation map of Wyoming, adapted from
Marston (1990). Dark Blue = >100 cm; light blue = 50-100 cm; Green = 40-50
cm; Yellow = 30-40 cm; Tan = 20-30 cm; Orange = 10-20 cm; black = state
and county borders.
Fig. 1 (Updated from the 1960-93 map) Spatial distribution of rangeland
grasshopper outbreaks in Wyoming from 1944 to 1994, with no data for 1982,
1983 or 1984 (Schell 1994). White = no recorded infestations; light shading
= 1-2 yr infested; dark shading = 3-4 yr infested; purple = 5 yr infested;
blue-green = 6-7 yr infested; red = 8-9 yr infested; orange =10-11 yr infested;
yellow = 12-21 yr infested; black = state and county borders.