One of two Coelioxys species in Ireland, both of which are scarce and difficult to tell from one another. C. elongata females generally have the tip of the fifth sternite notches rather than pointed, as in C. inermis. Males are similar and require microscopic examination of the genitalia to be sure of identification. A paucity of recent records and sites means it is classed as Endangered, although it is likely to be underrecorded.

Distribution in Ireland: Widely recorded, more so from the southern counties. It appears to be scarce or absent from the west and northeast.

Flight Period: Univoltine, flying in an extended flight period from mid-June until early September.

Habitat: Found wherever its hosts may be found, including woodland edges, dune systems and scrubby areas, but it’s precise requirements are not well known in Ireland.

Flowers Visited: Not an avid flower-visitor, but will occasionally visit flowers such as Cat’s-ear, Bird’s-foot Trefoil, clovers and various others.

Personal Records: I have recorded this species on several occasions, at the Raven Nature Reserve in Co. Wexford and at Dawros Head (Co. Donegal). It seems scarce in Ireland generally and probably exists at low population levels, even if it is widespread. It is reported to use Megachile willughbiella in Britain, which is probably its host here in Ireland.