Ночная бабочка Hadena bicruris: экология и опыление растений.

Species of moth

The lychnis (Hadena bicruris) is a moth of the family Noctuidae. It is found in northern and western Europe and Turkey. It has an Atlantic Mediterranean distribution. In the East Palearctic it is replaced by Hadena capsincola.

This species has dark brown forewings marked with two prominent white bordered stigmata and a white subterminal line. The hindwings are buffish, darkening to brown towards the margin but with a prominent white fringe. Seitz states Distinguished from rivularis F. by the absence of the violet sheen; the markings white instead of yellow; the upper stigmata not conjoined; a conspicuous black blotch above inner margin near base; hindwing fuscous. Larva dull brown, with darker dorsal line and oblique subdorsal streaks.

One or two broods are produced each year and adults can be seen between May and September. Flight is from June to July. The larva feeds on various Caryophyllaceae such as Dianthus, Lychnis, Saponaria and Silene. The species overwinters as a pupa.

H. bicruis is a nocturnal pollinator meaning that it frequents flowers late in the day or at night. Flowers pollinated by moths are often pale in colour, allowing for moonlight to be reflected for easy detection by pollinators. In this type of pollination system the host plant and pollinator, in this case the moth, are dependent on each other. This relationship can also be considered parasitic as offspring consume seeds, which impacts seed dispersal. It is important to note that this system is not as strong as other nursery pollination systems, and that co pollinators can alter the interaction between H. bicruris and S. latifolia. When the moth then visits the next flower, pollen granules may be transferred from the body to the stigma of the receiving plant. Despite the lack of specialised pollination structures, H. bicruris are considered to be the most efficient pollinator of S. latifolia, where both sexes contribute equally to pollination. Although there is a cost to plants by seed predation, this will potentially occur following visitation by a female. Compared to when a male visits the plant, he will only consume the nectar and not have any impact to any part of the plants structure. H. bicruris visit both male and female S. latifolia flowers, and show no preference for flower sex. Studies have found in S. latifolia that 80% of visits by H. bicruris resulted in fruit production, with 45% of ovules being fertilised after a singular pollination visit.