Helophilus groenlandicus (Fabricius, 1780)
Biology & ecology:
This would appear to be a boreal species that is confined to low-lying wetlands on or near the coast (in Scotland). Elsewhere it is a widely distributed Holarctic species. The larvae of this genus are ?long-tailed?, a modification that allows the animal to breathe whilst living entirely submerged. As yet, the larva has not been found or described so very little is known of their ecology, but an association with boggy pools on or near the coast appears to be consistent with the known distribution of H. groenlandicus. The adults are flower visitors and are reported pollinators of Primula laurentiana in North America.
All of the known records are from the North-west coast of Scotland and the inner Hebrides.