We've got more flies here too.. and yes most of them are that metallic green... they are a bit smaller than the usual bluebottles we get though. Tried sticky fly papers last year and they were a nightmare... if you got the sticky on you while you were pinning them up you couldn't shift it... some "fell off" the strings then I had sticky on the carpets.... not nice... still don't like the sprays though, tend to open a window and hope the go as the came..