What's That Bug? does not endorse extermination

Mydas Fly
WTB,
I have had this huge flying insect run me out of my flower beds for the past couple of years. I saw it attack a Digger Wasp in my vegetable garden last year! I am pretty sure it is a Mydas Fly, but I would like to know a little bit more information on it. What does it do? Does it sting? LOL
Monica Ragsdale

Hi again Monica,
This is a Mydas Fly, Mydas clavatus. The adults are predatory, feeding on caterpillars, other flies, bees and true bugs. I guess with your observation, we can add wasps to the menu. Also, your photo implies that they also feed on nectar which many flies do. Larvae live in rotting wood and probably feed on beetle larvae. Flies do not sting, but they will probably bite if mishandled.

What's That Bug? does not endorse extermination
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2 Responses to Mydas Fly

  1. Laura says:

    Hi -I live in Tampa,FL and today saw a very LARGE wasp looking bug in the grass. Had to be 1-1/2-2″ across. totally black but had a blood red band around the middle. the Mydas fly looks to have an orange band??. Couldn’t get a picture because being a girlie-girl, I ran inside! Had large wings as he was moving around (I was in the screened room). Any ideas? PS your website it awesome and so informative. Thanks for any info. this is the first one I’ve ever seen in Florida. Hugs…..

    • bugman says:

      You may have encountered a Mydas Fly, but since the Mydas Fly is a mimic of wasps, you may have also encountered a Spider Wasp like this individual on BugGuide or a Digger Wasp, also represented on BugGuide. You may also read more about Mydas Flies on BugGuide.

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