Burying beetles (Nicrophorus) are hard to miss. The insects aren't big, but most species are painted with vibrant, orange blotches on a glossy black background. According to new research, walking around dressed in their Halloween best may have an important function. The coloration may be "aposematic," bright and conspicuous to sternly warn other animals of the wearer's unsuitability as a meal. So, what is it about the burying beetle that makes it noxious to would-be predators?
Anal secretions. That's right, butt juice.