Scarab beetles generally do not bite humans in a way that causes harm or injury. Any contact with their mouthparts is typically non-threatening, as these insects are not aggressive towards people.
Scarab Beetle Characteristics
Scarab beetles possess mouthparts, specifically mandibles, but these are primarily adapted for their dietary needs rather than for biting flesh. Their mandibles are designed for chewing various substances like decaying organic matter, plant materials, fungi, or even animal waste, depending on the species. This adaptation means their mouthparts are not structured for piercing human skin or for predatory actions against larger animals. Scarab beetles generally exhibit a non-aggressive temperament towards humans.
The diet of scarab beetles varies significantly across the more than 30,000 known species. Many are detritivores, feeding on dung or decomposing plant material, while others consume roots, leaves, flowers, or fruit. Their typical habitats include soil, decaying wood, or areas rich in organic matter, aligning with their dietary preferences.
Encountering Scarabs
Should a person come into contact with a scarab beetle, a true bite that breaks the skin is highly unlikely. While they do not bite aggressively, a scarab might pinch with its legs or mandibles if handled roughly or if it feels threatened. This pinching action is typically harmless, resulting in mild discomfort but not significant injury. Human skin is generally too thick for most beetle mandibles to cause substantial damage.
When disturbed, scarab beetles often react by withdrawing their legs and “playing dead,” or they may attempt to fly away. If one is found indoors or in an unwanted location, it can be gently guided onto a piece of paper or into a container and then safely released outside. There is no need to crush or harm the beetle, as they pose no direct physical threat to human health.
Broader Impact of Scarabs
While scarab beetles do not pose a biting threat to humans, some species can affect human interests in other ways. Many scarab species play important ecological roles, serving as decomposers that break down organic matter and recycle nutrients in ecosystems. Dung beetles, a type of scarab, are particularly notable for their role in cleaning pastures by burying animal waste, which also helps prevent the spread of diseases to livestock.
However, certain scarab species are recognized as agricultural or garden pests. For example, Japanese beetles and June bugs can cause damage to plants, crops, and lawns through their feeding habits. This impact is limited to vegetation and does not involve direct harm to humans through biting.