Abstract: Nearly all organisms interact with conspecifics at some point in their life history. These interactions can result in a focal individual's phenotype being altered by the phenotype of another individual. These phenotypes can relate directly to fitness and thus selection, or the interactions can alter a behavioral phenotype which then impacts an individual's fitness and selection on an individual. In this study, a saprophytic tenebrionid beetle, Bolitotherus cornutus , was photographed, sorted by horn size, and arranged in subpopulations under the umbrella of two treatment regimens. The first was a subpopulation that was altered to have more numerous short horned males, and the other treatment was skewed to be more numerous for long horned males. Due to a sorting error, these treatments were not applied, and data had to be analyzed observationally. It was discovered that activity positively correlates to horn length, as well as several sightings of forked fungus beetles flying.