Boreal Burying Beetle

Nicrophorus vespilloides is a burying beetle described by Johann Friedrich Wilhelm Herbst in 1783. The beetles vary widely in size and can present with a range of anywhere from 12 mm to 20 mm in size. They have two conspicuous orange-yellow bands on the elytra. The color of the antennae are an important distinguishing feature, being totally black. The color of their orange and black markings is multifunctional, as they are conspicuous to avian predators. In general, they present a unique ecological niche, which is their evolution of aposematism, or the strategy they use to warn predators through their conspicuous signals. The wing cases of these beetles possess a squarish shape and are notably shorter in length than their abdomens, indicating a distinct physical characteristic of the species.

Overall, there are reported differences in coloration and chemical defenses among the sexes. This is hypothesized to stem from conflicting selection pressures for the different sexes. They also produce anal fluid or exudate from their abdomen when they feel threatened. These anal fluids further contribute to the antimicrobial defense of these beetles.