. Evaluation of salmonflies in Montana's rivers : are statewide populations really declining?. Aquatic insects; Aquatic habitats; Flies; Insect populations; Salmonfly. Figure 8. Giant salmonfly collection data in the Yellowstone River from the 1970's (top) and 1994-2005 (bottom). Pteronarcys californica - O Present # Absent T~ ~~W—. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stagliano, David M. ,author; Montana Natural
. Evaluation of salmonflies in Montana's rivers : are statewide populations really declining?. Aquatic insects; Aquatic habitats; Flies; Insect populations; Salmonfly. Figure 8. Giant salmonfly collection data in the Yellowstone River from the 1970's (top) and 1994-2005 (bottom). Pteronarcys californica - O Present # Absent T~ ~~W—. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stagliano, David M. ,author; Montana Natural Heritage Program. [Helena, Montana?] : Montana Natural Heritage Program
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