How do darkling beetles survive in different habitats?

Darkling beetles (family Tenebrionidae) exhibit remarkable adaptability, allowing them to thrive in diverse environments ranging from arid deserts to stored food supplies. Their survival strategies include:12

• Physiological Adaptations: In dry climates, species such as the pinacate bug (Eleodes) possess fused wing covers (elytra) that significantly reduce water evaporation from their bodies, helping them conserve moisture.1
• Habitat Specialization: These beetles occupy varied niches. Some species inhabit rotten wood or live under bark, where they may act as predators of other larvae. Others reside in damp environments, feeding on fungi, rodent excrement, or various wastes.2
• Nocturnal Behavior: As their name suggests, many darkling beetles are nocturnal, which helps them avoid the harsh conditions of the day and potential predators.1
• Dietary Flexibility: They function primarily as scavengers or predators. While many consume decomposing vegetation or animal tissue, others have adapted to human environments, becoming pests in stored products like grain and meal. Some species even live within ant nests.12

These varied behaviors and physical traits allow the family to maintain a global distribution across nearly every continent.1