Head to head
Bess Beetle vs Darkling Beetle
A bess beetle and a darkling beetle both make a living breaking down organic material most animals ignore, but one has built an entire family-colony society inside a single log while the other spans a family so enormous it includes both a Namib Desert fog-harvester and the ordinary mealworm.
| Bess Beetle | Darkling Beetle | |
|---|---|---|
| Scientific classification | Passalidae | Tenebrionidae |
| Social behaviour | Genuine family colonies | Solitary |
| Communication | Stridulation between adults and larvae | None notable |
| Habitat | Rotting logs in deciduous forest | Nearly every terrestrial habitat worldwide |
| Diet | Decaying wood | Decaying plant matter, fungi, grain |
| Notable adaptation | Parental pre-digestion of wood for larvae | Fog-harvesting in desert species |
| Species diversity | Modest | Tens of thousands of species |
| Conservation status | Least Concern | Least Concern |
Bess Beetle vs Darkling Beetle: common questions
Which of these beetles is more social, the bess beetle or the darkling beetle?
The bess beetle is far more social, living in genuine family colonies within a single rotting log and communicating with other adults and its own larvae through stridulation, while the darkling beetle is generally solitary, with individual beetles across its enormous family not forming any comparable colony structure.
Is the mealworm related to the bess beetle?
No, the familiar mealworm is the larval stage of a common darkling beetle species, not a bess beetle, meaning anyone who has fed mealworms to a pet has handled a young darkling beetle rather than a member of the more socially complex bess beetle family.
How do bess beetles help their own young while darkling beetles generally don't?
An adult bess beetle partially pre-digests decaying wood before making it available to larvae within its colony, a direct form of parental care, while darkling beetle larvae, including mealworms, generally fend for themselves without any comparable adult provisioning, reflecting the darkling beetle's solitary rather than family-colony lifestyle.