After last years breeding resulted in two fledged youngsters, we have been watching and waiting to see if their saga continues and indeed on the 23 of May they were seen mating again. They have 3 different nests on our property and we will watch with great interest to see which one they choose to utilize. A sure sign would be when they start carrying green leafy branches to the nest. Most Eagles do this and there are some interesting theories as to why this happens. An obvious answer is to protect and insulate the eggs but it might be more than this. It is possible that trees are used that have a natural insecticide to help keep nest lice out, an example here would be a Eucalyptus species. When we were living in arid areas we would see a few species using Wild Rosemary (Eriocephalus species) for possibly the same reason.
Raptor nests’ are fascinating to watch and because of the bird’s being long lived the nest’s can be immense. I have not measured these nests but examples from other study sites include nest’s that were taller than 6m.