This adds to the intriguing question of how green males grow up, how they transform around age 7 into black mature males. I don't know if they all do change. I don't know what comes first, the behaviour or the physiological changes to a new character and a new role and a new colour.
In this movie, on the afternoon of 17 June, a different situation. On 11 May in this blog, Green Bird Afternoon showed a green male spending more than 20 minutes concentrating on being a grown-up, tending the bower, trying out tunes and dance steps. Today a movie almost 47 minutes long, actually covering more than an hour in which a green male had uncontested command of the bower. Odimbar, the black male, comes back briefly early in the movie, but there is no serious squabble and he leaves the bower after a short time, to return near the end of the film. It's as if he's happy to have had someone mind the bower while he went for a long lunch.
So we bring you Green Bird's Learning Curve ... if this is the bird of 11 May, it's further up the curve. Or it may be a different bird with a different style and voice. But unlike the 11 May bird, it's not claiming 'squatters' rights'.
One of the things the green bird has done today is leave saliva on the twigs of the bower. There are two notions here. The bowerbirds' eyes see different wave lengths compared to humans and for these birds the twigs saliva treated are luminous. Whether different birds offer different luminosity etc... you need to consult a bowerbird-naturopath perhaps. But the other notion is that female bowerbirds sample the saliva on twigs in bowers as part of their assessment. So what are we to make of multi-saliva-ised twigs?