Dipper Update

In the warm sunshine of today, I saw a single dipper, fishing in the brook, and flying straight up to the supposed nest hole and and yes - there it was a screaming of little birds - it is now a bona fide nest site with hatched birds.   Almost instantly as it entered the hole, dipper flew out  - was it the same ? not sure I only ever saw one in the brook at a time  so it could be a single parent !