Y Glesyn Cyffredin - Common blue
The Common Blue still lives up to its name in many coastal districts but
overall the species has suffered a drastic decline in numbers due to the
relentless increase in farming efficiency. It is now almost unknown inland
in the greater part of North Wales though numbers do pick up again in low-lying
eastern districts. Where conditions are favourable, such as on ungrazed or
lightly grazed coastal dunes, the population density can be high.
In the north of Britain the species is univoltine. In North Wales, however,
there are two generations each year and second brood individuals can still
as late as the first week of October. In fact, the true situation may be more
complicated with some first brood larvae not emerging until the following year.
The larvae feed on - Common Bird’s-foot Trefoil (Lotus corniculatus) and
The first 4 & 8th photographs show males, which are more spectacular than
the female that can be
for a Brown Argus.