Sorry, posting for traffic, but what the hell are these? I don't think they're mosquitos but I don't really know. The wings are a mix of transparent an black. Even if we only open a small bathroom window during the day time we seem to get loads in the house. They don't flit so are easy to deal with but I'm fed up with them and want to be able to open more windows. DH is wondered if they've 'nested' (whatever the hell you call it for insects) in a window frame?