What's That Bug? does not endorse extermination

Tachinid Fly?
October 9, 2011
in paso robles yesterday, this very bristly, large beastie flew away from its mates on the coyote bush into the house. he was fearsome-looking, but didn’t mind being caught in a jar and released 🙂
this guy had definite orange spots. i looked him up in the book i have in paso robles, but forget its name  – the fly and the book…
clare.

Spiny Tachinid Fly

Ed. Note:  This came to Daniel’s personal email address from a close friend.  Here is some of the email chatter.

Julian Donahue provides some input
Tachinid, all right. Perhaps one of the ones that parasitizes the wild silk moths, like Hyalophora euryalus (that’s the name of the moth, not the fly). There are also some big ones that parasitize earthworms.
jpd

he looked big enough to parasitise anything his little heart desires!
i have only ever seen them in the fall… could that be?

http://bugguide.net/node/view/449075/bgimage

ooh – yes, that’s him (her?).
Tachinid Fly – Paradejeania rutilioides
they were all over the baccharis.
it’s a lovely camera. but, the beast was inside the house and i was outside the window shooting thru not exactly recently-cleaned glass. further, the beast was high on the rolled up blind – and i was on my tiptoes – wobbling

BugGuide reports them in California from August through December.  BugGuide also notes:  “Adults take nectar, especially from late blooming Asteraceae.  Larval host: the arctiid moth Hemihyalea edwardsii, at least in part of its range (Hsu & Powell 1992).”  Surprised Julian didn’t know that Arctiid host tidbit.

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

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