Can anyone help identify these? They are emerging in large numbers currently, mid march onwards but I cant locate their source. There are two squat and chunky antennae? on the head and the body is covered with very long coarse black hairs.
Sorry about picture quality.
Are these under the heading drain flies?
I have had our fly specialist take a look at these and he has provided the following diagnosis:
"I cant be sure what these are because not enough detail is visible on them, but think they are most likely to be Leptocera caenosa (family Sphaeroceridae). This is a fairly common species in Britain which is most often found in or near human habitation, with a tendency to be found more often indoors than outdoors. It often breeds in sewage and infestations of these flies usually originate from cracked or blocked drains. The term Drain Fly would therefore be appropriate for them, but this term is more usually applied to Moth-flies (family Psychodidae), another group that sometimes breeds in drains, and the flies in the photos are definitely not those. These flies do not bite, and despite their habits are not a major threat to human health because they are not particularly attracted to stored food. However, should they alight on food there is some risk that they could contaminate it with harmful micro-organisms that might cause stomach upsets."