Day flying moths

[KTL6]

>Nevertheless, my
>perception from the field is that I am at least twice as likely to encounter
>a butterfly than I am a day flying moth.

generally, I would agree with this.  But in the last two weeks, I have seen
many moths flying and nectaring during the day.  The days have been sunny so I
can not put it down to a cloudy day.  I am wondering if this has to do with the
length of the days as we are entering the fall season.