. Evaluation of salmonflies in Montana's rivers : are statewide populations really declining?. Aquatic insects; Aquatic habitats; Flies; Insect populations; Salmonfly. Pteronarcys californica: 1994 -2005 I • Present # Absent 18. 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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