Autumnal moths

Considering that most insects need heat before they can move, it never ceases to amaze me that some species don't emerge until it's almost time for a frost. This is the Small Autumnal Moth - Epirrita filigrammaria.


And this is the November Moth - Epirrita dilutata, in a colour form that makes it paler than the virtually indistinguishable Pale November Moth.

I suppose it means that there is less competition for food, but it seems a risky strategy.