Beech scale is a newly invading insect pest in Michigan, and consequently little is know about their distribution and population dynamics. Beech scale densities were estimated using qualitative visual assessments and a new quantitative method of digital photography. Samples from 803 sites, from 2005-2009, across Michigan show that beech scale has infested most of the distribution of beech in the Upper Peninsula, and the north and western ranges of beech in the Lower Peninsula. In addition, beech scale was found on several islands. Beech scale is distributed in 12 satellite populations, which differed in density and spread rates. Also, some satellite populations are on islands further from the mainland than wind dispersal is thought to carry scales. Four of five satellites tracked from 2007-2008 showed increases in density whereas one satellite declined. Within-year scale densities follow beech scale biology, showing slight decreases in summer months when adults die, increases in fall when the new generation of beech scale become visible, and slight decreases or no change in winter months when scales are dormant.