Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Worm-like ?larvae?

Worm-like ?larvae?
Georgia, USA
June 8, 2005
Homeowner reports to me: "Recently, large groups of worms have been crawling onto the patio from the lawn. At first, they appear to be a large stick or clump of mud, but upon closer inspection, it is hundreds of them moving as a single unit. There may be several groups of them. When sprayed with bug spray, the cohesive group breaks up and they die quickly. The next morning, there are several groups of them on the patio again. They get as far as the wall of the house and form a mound there."


Sciaridae larvae.
This is great! I've never seen this phenomenon, but have heard plenty about it. These are larvae of dark-winged fungus gnats in the family Sciaridae. Apparently they sometimes "migrate" like this, especially in the southeast and mid-Atlantic U.S.

Never heard of that before. I was just looking around some on the web and found references to this. Also it was mentioned that some at least feed on mushrooms and migrate when their population explodes. We've had a lot of rainy weather lately, so maybe that has contributed to this.

Something like these, perhaps?

More specifically, a group of gregarious sawfly larvae looking for their host? Have they spotted any around the bases of their trees?