Subject: Large Fly?
Geographic location of the bug: Gaithersburg, Maryland, USA
Time: 02:56 PM EDT
Your letter to the bugman: This fly(?) has been flying around my deck. He is about 1″ long. He seems to like sitting on this light colored umbrella, but he does land on darker surfaces.
How you want your letter signed : NancyA
This impressive fly is a Tiger Bee Fly, a parasitoid that preys on Carpenter Bees. According to the Missouri Department of Conservation: “The female tiger bee fly deposits her eggs in places where carpenter bees have laid their eggs. The bee fly larvae eat the carpenter bee larvae.”
Thanks! I thought I had not successfully submitted that email and photo, but
I guess I had! I figured it out from a combination of searching the
WhatsThatBug web site and an Internet search and I was astounded to find out
what it is. I definitely have carpenter bees. In fact, one is giving me
trouble in the very table that the umbrella is stuck in that the fly was
sitting on when I took the photo!