Quick Take
- Darkling beetles must harvest 100% of their total hydration from arid desert air.
- The hydrophilic shell creates 1 unique physical constraint for fog-basking insects.
- The body heat of the beetle performs a counterintuitive role against cool fog.
- Researchers are analyzing the shell structure to advance biomimicry for water scarcity.
Nature is full of amazing adaptations, some of which are almost difficult to imagine. One such example is that of the darkling beetle. These beetles live in harsh, arid deserts, making it difficult to stay hydrated. They have evolved to survive in these conditions and harvest their water from the air. This Instagram post by @explainingnature shows this process in a short animation, highlighting an incredible feat of nature. Read on to learn more.
Darkling beetles harvest water from fog and dew in harsh African deserts, inspiring human innovations in water collection.
©makasana/iStock via Getty Images
How Do Darkling Beetles ‘Fog-Bask’?
Darkling beetles are a resilient species that make the most of their harsh environments. These beetles inhabit the deserts of southwestern Africa, where there is little rainfall. To compensate for this, they use a unique method to obtain water: they get it from the air. More specifically, these beetles harvest water from dew and fog. To get water, they practice something called fog-basking. Fog-basking is a behavior where an insect or animal faces into the wind to absorb water from the environment.
The beetles do this by raising their rear ends into the air. The cool fog hits their bodies and condenses into water droplets that collect on their hydrophilic shells. The water then runs down their bodies toward their mouthparts, where the beetles can drink the collected droplets. Their shells emit heat, which contrasts with the cool air and helps promote condensation.
This amazing ability is inspiring scientific research aimed at helping humans collect water in similar ways. This is known as biomimicry, or emulating nature in our own engineering practices. Researchers are analyzing the beetles’ bodies, especially their shell structure, to develop similar methods for collecting water.
With global warming and pollution jeopardizing our access to essential resources like water, humans are adapting to these changes by learning from nature. The amazing ability of these beetles to collect water from fog could prove extremely beneficial to humans as a new source of water for regions facing scarcity.
