European grain moth

This moth ranges widely across the western Palearctic. However, even in its native range its distribution is somewhat patchy; in the UK for example, it is widespread, but may still be locally absent. It has not been recorded from France and Slovenia, but this may simply be due to its being overlooked or confused with similar species than being genuinely absent, as it is found in the neighboring countries. Its apparent absence from Iceland, on the other hand, is more likely genuine. But this synanthropic moth has been distributed essentially all over the globe, though many such introduced populations are not stable for long periods of time. Still, it is regularly found in Australia for example, about as far away from its native range as is possible on Earth. The adults are most often seen throughout the summer months, e.g. from March to September in the UK. Naturally, populations associated with humans can be encountered at any time of the year.

This small moth has a wingspan of 10–18 mm. The forewings are irregularly mottled black, white and grey, resembling close relatives such as the cork moth (N. cloacella). They have a row of large black spots on the leading edge, which merge with spots within the wing to form a rough band zigzagging along the length of the forewings. The hindwings are uniformly greyish-brown and surrounded by a fringe of long hairs. …