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Window Fly Larva

Posted by December 2nd, 2005 at 1:00 am

Categories

Flies

larva from compost
Hello
these guys are in my compost heap. Are they good, should I be worried?
Joseph Morabito
Wildomar Cal
Picture was taken late Nov 2005

window fly larva joseph Window Fly Larva

Hi Joseph,
This looks like a Window Fly Larva, Hermetia illucens. These are large flies that look like black wasps. The larvae feeds on decaying fruits and vegetables and is often found in compost heaps. It is thought that it might prey on more pestiferous maggots. They are benign.

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