Onymacris unguicularis

The head-stander beetle (Onymacris unguicularis) is a species of fog basking beetle that is native to the Namib Desert of southern Africa.[1] Native to a very arid yet very foggy region, the beetle is nicknamed the "head-stander" beetle for its habit of tipping its head downward and using its legs and the rest of its body to collect water. Fog condenses on the beetle's body to form water droplets. It then directs these drops towards its mouth to hydrate.[2]

The head-stander beetle's adaptation to its extremely arid environment has inspired new technology. Kitae Pak, a student at Seoul National University of Technology, invented the Dew Bank, a water bottle that collects water from dew, similar to the beetle.

Onymacris unguicularis
Onymacris unguicularis MHNT (cropped)
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Tenebrionidae
Subfamily: Pimeliinae
Genus: Onymacris
Species: O. unguicularis
Binomial name
Onymacris unguicularis
Haag, 1875


  1. ^ Hamilton, William J.; Seely, Mary K. (1976). "Fog basking by the Namib Desert beetle, Onymacris unguicularis". Nature. 262 (5566): 284–285. doi:10.1038/262284a0.
  2. ^ http://www.wwk.in/biology/evolutionary-biology-a-ecology/understanding-evolution

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