The patterning on the abdomen is quite variable, but usually it shows black well spaced dorsal triangles.

They are predatory hunters, feeding on small beetles and earthworms.

[4] It can be found in wet meadows, hedgerows woods and areas with a rich vegetation.

Media related to Rhagio tringarius at Wikimedia Commons

This article related to members of the fly superfamily Rhagionoidea is a stub.