Nairobi fly

Paederus sabaeus, commonly known as the Nairobi Fly is a species of rove beetle in the genus Paederus. The beetle contains a corrosive substance known as pederin.[1] As it is a beetle and not a fly, and as the pederin causes chemical burns, it sometimes humorously referred to as a dragon bug.

Nairobi Fly
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Coleoptera
Family:
Staphylinidae
Genus:
Paederus
Species:
P. eximius
and P. sabaeus
Binomial name
Paederus eximius
Paederus sabaeus

Description

Adult beetles are predominantly black and red in colour, and measure 6–10 mm in length and 0.5-1.0 mm in width.[2] Their head, lower abdomen, and elytra are black, with the thorax and upper abdomen red.[3]

Biology

The beetles live in moist habitats and are often beneficial to agriculture because they will eat crop pests. Adults are attracted to incandescent and fluorescent lights, and as a result, inadvertently come into contact with humana.[3]

Heavy rains, sometimes brought on by El Niño events, provide the conditions for the Nairobi fly to thrive. Outbreaks have occurred in 1998,[1] 2007, 2019, 2020.

Relationship to humans

Paederus dermatitis

The beetles neither sting nor bite, but their haemolymph contains pederin, a potent toxin that causes blistering and Paederus dermatitis. The toxin is released when the beetle is crushed against the skin, often at night, when sleepers inadvertently brush the insect from their faces. People are advised to gently brush or blow the insect off their skin to prevent irritation.[1][4]

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References
  1. "'Nairobi fly' doesn't sting or bite, but it sure does hurt". CNN. January 26, 1998. Archived from the original on January 28, 2007.
  2. Stefano Veraldi & Luciano Süss (1994). "Dermatitis caused by Paederus fuscipes Curt". International Journal of Dermatology. 33 (4): 277–278. doi:10.1111/j.1365-4362.1994.tb01045.x. PMID 8021088.
  3. Mammino, Jere J. (November 2011). "Paederus Dermatitis". The Journal of Clinical and Aesthetic Dermatology. 4 (11): 44–46. ISSN 1941-2789. PMC 3225135. PMID 22125660.
  4. Mammino, Jere J. (November 2011). "Paederus Dermatitis". The Journal of Clinical and Aesthetic Dermatology. 4 (11): 44–46. ISSN 1941-2789. PMC 3225135. PMID 22125660.


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