Canyon mouse records make the most sense against Utah’s rocky slopes and broken canyon walls, not the open water suggested by broad Great Salt Lake and Bear River labels. Crevices and boulder fields around basin margins offer the cover this mouse uses, linking northern records with canyon country farther south.
Reports rise most clearly from August through October, with September at the center of the peak. Survey timing and warm nights influence that shape, so it isn’t a direct count of the population.
Full species profile
