Invisible moth (365 mono #338)

My friend, Martin, from work tried to explain where this moth was so that I could get a photograph.  I couldn't see it anywhere.  He even came to point it out to me and I still couldn't spot it.  I don't think I am going to make it into moth spotting college anytime soon!

Apparently it is a Dark Dagger or a Grey Dagger.  The only way to tell for sure is to cut it up into little bits....I still could't tell!