One of the reasons people used to believe that Swallows hibernated in ponds (don't laugh!) was because they are often around until quite late in the year.
Charles Coutts said
Fri Oct 4 6:44 PM, 2013
I have been in Northumberland for the last week,and was surprised to find lots of Swallows still around, Mostly on Holy Island,I would have thought they packed their bags long ago.
Mostly on Holy Island,I would have thought they packed their bags long ago.