Back to Wyoming Grasshopper Maps
1944-96 Grasshopper Outbreak Frequency Map
|
1944-49 Grasshopper Outbreak Frequency Map |
1950-59
Grasshopper Outbreak Frequency Map |
1960-69
Grasshopper Outbreak Frequency Map |
1970-79
Grasshopper Outbreak Frequency Map |
1980-89
Grasshopper Outbreak Frequency Map |
1990-96
Grasshopper Outbreak Frequency Map |
Spatial
distribution map for the years when less than 300,000 ha were infested
|
Spatial distribution for map the years when more
than 1,000,000 ha were infested |
Region definition
map |
Infestation collapse 1966-67 map |
Infestation
collapse 1968-69 map |
Infestation collapse
1975-76 map |
Infestation collapse 1987-88 map
|
Infestation collapse 1988-89 map |
Infestation
expansion 1962-63 map |
Infestation expansion
1971-72 map |
Infestation expansion 1973-74
map |
Infestation expansion 1978-79 map
|
Infestation expansion 1986-87 map
Additional Fig. Spatial distribution of rangeland grasshopper outbreaks
in Wyoming from 1944 to 1949 (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; black = state and
county borders).