“Ruffed grouse drums increased 34 percent from the previous year, with the increase happening in the northern part of the state,” said Charlotte Roy, DNR grouse project leader. “This may signal the start of an upswing in the grouse cycle that since 2009 has been in the declining phase.”
The increase is consistent with changes typical of the 10-year grouse cycle. The most recent peak in drum counts occurred in 2009. The cycle is less pronounced in the more southern regions of the state, near the edge of the ruffed grouse range.
Compared to last year’s survey, 2014 survey results for ruffed grouse indicated increases in the northeast survey region, which is the core of grouse range in Minnesota, from 0.9 drums per stop in 2013 to 1.3 in 2014. Drumming counts in the northwest increased from 0.7 drums per stop in 2013 to 1.2 in 2014. Drumming counts did not increase in the central hardwoods or southeast, with an average of 0.8 and 0.3 drums per stop, respectively.
Ruffed grouse populations, which tend to rise and fall on a 10-year cycle, are surveyed by counting the number of male ruffed grouse heard drumming on established routes throughout the state’s forested regions. This year observers recorded 1.1 drums per stop statewide. The averages during 2012 and 2013 were 1.0 and 0.9, respectively. Counts vary from about 0.6 drums per stop during years of low grouse abundance to about 2.0 during years of high abundance.