I don't think it is likely to be a juvenile at this time of year. This seems to be a female Orange-bellied Leafbird.
The confusion on this individual will be from the orange colour on the face. This is not the coloration of the bird, but is pollen from flowers where it has been feeding. Similar staining from pollen can often be seen on Japanese White-eyes at the moment. Both leafbirds and white-eyes (as well as other species such as sunbirds and Mountain Bulbuls) often feed around flowers, and are important for pollination of some plant species.
