I can't be sure, but I thought this might be the juvenile
I haven't moved --- but the Kookaburra seems to be watching any little birds that fly overhead
here's the family, high in the Angophora tree yesterday morning
Fact Sheet where you can hear the Kookaburra's loud song, which it says is not a laugh, but rather, a territorial call to warn other birds to stay away.
Sharing with Wild Bird Wednesday