The largest fly in the world

Gauromydas is a giant genus of Mydas fly (family Mydidae), that occurs in the Neotropical Region (Central and South America).

The largest of which is Gauromydas heros (Perty, 1833), of which the females can reach a length of up to 70 mm, with a wingspan of 100 mm. The males are known flower visitors, while the females do not feed at all. The larvae live in ants' nests, feeding on the immature insects. There are currently 6 known species of the genus.1

Gauromydas heros (Perty, 1833)
photo By Biologoandre - Own work, CC BY-SA 4.0,

Gauromydas mystaceus (Wiedemann, 1830)
Photo provided by Torsten Dikow

1. Calhau, J. et al. 2015. Review of the Gauromydas giant flies (Insecta, Diptera, Mydidae), with descriptions of two new species from Central and South America. Zootaxa 4048(3):392 DOI: 10.11646/zootaxa.4048.3.3


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