Adult Barberry Carpet moths have greyish-white forewings with attractive brown patterning (5), and the hindwings are paler and more uniform (6). The caterpillar is brown in colour and has a stout appearance with darker stripes along the back (5); it moves by a 'looping' action (7). The common name refers to the larval foodplant, barberry (Berberis vulgaris) (3).
This is a 'double-brooded' or 'bivoltine' species; two generations are produced during a single year. Adults of the first brood are active in May and the beginning of June, their eggs hatch, the resulting caterpillars are active in mid-June to mid-July and then pupate. The second brood adults emerge in August, the caterpillars that hatch from their eggs are active in August and September, and the pupae overwinter as a dormant stage. When the adults emerge the following year in April/May, the cycle begins once again (2). The caterpillars feed on barberry (3).
This endangered moth once had a fairly widespread distribution from Devon and Sussex reaching as far north as Yorkshire (3). Following a decline, just nine known native breeding sites currently exist in 5 counties including Gloucestershire, Wiltshire, Hampshire, Suffolk and Dorset (7). Elsewhere the range extends through Europe reaching east to Asia Minor and north to Sweden (3).
Since the 19th century the foodplant has been removed from hedgerows because it was identified as a host of the wheat-rust fungus Puccinia graminis, which affects agricultural crops (7). In addition, damage often occurs to barberry plants through burning and hedge trimming (3). At present, efforts are being made to propagate barberry, with promising results (7).
This moth has been identified as a priority species under the UK Biodiversity Action Plan and is the focus of an English Nature Species Recovery Programme, which began in 1995 (3). The aims of the Species Action Plan include the maintenance and enhancement of all known populations, and the restoration of ten populations within the historic range by the year 2010 (3). These targets have begun to be met through an English Nature-funded captive breeding programme at Bristol Zoo with subsequent releases into the wild (8). Further collections of this species are held at Dudley Zoo, Whipsnade Wild Animal Park, and by a number of private breeders (7).
(Also known as 'double-brooded'). Insect life cycle that takes 12 months to be complete, but involves two generations in that time. The first generation adults lay eggs that give rise to those of the second generation. The second generation overwinters either as an egg, larva, pupa or adult.
Of the stage in an animal's lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
Stage in an insect's development when huge changes occur, which reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
The process of forming a pupa, the stage in an insect's development, when huge changes occur that reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
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