Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Lance Fly

family Lonchaeidae, genus and species unknown


Flies in this family are short-bodied, and wings have no spots. Bodies are typically blue or black, and often metallic. This is a small fly - only about 4mm as an adult.


Larvae can be found behind bark of trees and in stumps. Some feed on decaying vegetables. The larvae of most Lance Fly species are "phytophagous" meaning they feed on already damaged tissue. Adults often live in holes left behind by beetles that bore in wood. The above adult fly was photographed nibbling at the edge of a damp tree stump. These flies live mostly in forests and grassy areas.


I could not find a genera or species ID for this fly, and at Bug Guide, most are listed without taxonomy to species level. I've left it at family level, and I'm OK with that, but if anyone has more information about Lance Flies in California please do comment.

Species ID Suggestions

Sign in to suggest organism ID

No Comments

Spotted by

Long Beach, California, USA

Spotted on Nov 2, 2014
Submitted on Nov 2, 2014

Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team