Last night (maybe one or two o clock in the morning) I saw three birds swooping,hovering and gliding in circles above the town in which I live.  I have seen them before but usually only one at a time,and allways late at night. they seemed to be be very high up,and were large. they were pure white,or at least they looked to be.my first thought was that they must be some sort of owl,but I have no idea really!
I live in Porthmadog,which is a small coastal town on the edge of the snowdonia national park.

We had a similar question a while ago - and the consensus was probably an owl. See below

http://www.askabiologist.org.uk/answers … hp?id=5167