I found this on the net hope its of some use to you
"Their territories are well spaced - pairs do not tolerate another nest close by. The distance between each nest varies ranges from 0.5 km to 2.1 km. This is determined by the local food supply - the better the food supply, the smaller each territory will be.
The nest is usually built in lower parts of the canopy, close to the trunk of a tree and usually concealed from view. It is a sturdy platform of twigs, lined with bark flakes. A central 'cup' prevents the eggs from rolling out. Nest building can take several weeks and is often completed long before the eggs are laid."