What's That Bug? does not endorse extermination

LARGE Black Fly – Copestylum mexicanum?
Location: Hawthorne, CA
October 23, 2011 7:51 pm
I notice you have some photos of this large, bold fly here at your site. My question is, is mine also a Mexican Cactus Fly? It’s another ”new to the yard” bug, and I didn’t notice that it’s body was blue . . .
Signature: Thanks, Anna Carreon

Mexican Cactus Fly

Hi Anna,
Your identification of the Mexican Cactus Fly is correct.  The body is actually black with a blue sheen.  The blue sheen only shows when the light strikes the fly’s body from the right angle.

Mexican Cactus Fly

Thanks Daniel!  I noticed that in a related post you say that this is a skittish fly.  For some reason, our yard seemed to calm this particular specimen.  It stayed for long periods of time and didn’t seem to mind the camera being very close to it.  Not the first skittish bug this has happened with.  We wonder why this is.


What's That Bug? does not endorse extermination
Location: California

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