Alder Flies / Dobson Flies

Sialis sp. - Cheshire, England - May 2008

Alder Flies are common insects found on waterside vegetation in the spring. All 3 British species belong to the same genus and can only be identified by microscopic examination of the genetalia.

Sialis sp. - Cambridgeshire, England - May 2012

Sialis sp. - Derbyshire, England - April 2010

Zamora, Ecuador - December 2012