Quietly singing by the cavity, carrying old stuff out. At some activity seemed to end (but so it seened at other sites too) so I'm unsure if this was eventually nested this year as I didn't see later any. This cavity is threatened by ongoing park renovation and tree supposedly replaced by new.

Had frenzy (or Dingomania) with woodpecker made cavity which it apparently didn't use: singing, spreading wings, visiting cavity. Possibly paired with the one regularly visiting nest other tree. Eventually landed. 2/2