I am tagging along with Broken Wing here. I wanted to post this as I feel very strongly about our wild hookbill birds.

We have all seen that funny looking Lorrie, it's coloring is wrong. Is it a baby? A wild Sulpha Crested, seems to be hanging around on the ground, what is wrong with it? Should I pick it up, offer some food. What to do????

You can be sure if the feathers are not bright but mottled or it is hanging around your home, not able to fly most likely it has PBFD. It is rampant in Australia, to think otherwise is plain foolishness.

You have two choices.

Feed it out there in your yard, wild, which many do. They leave out bird feeders, unbeknownst to them they are keeping a population of a possible 50% PBFD positive species alive.

Take it in and look after it.

Should nature take it's course? Well if you don't take it in foxes will get it for sure (an unatural species introuduced to Australia)
Or worse still a feral cat, another problem for Australia and it's natural wildlife, this thing likes to torment it's prey and play with it.

Do you knock the bird on it's head, put it out of misery?
Or worse still, do you go into a blind panic and try to elimanate any trace of the bird, it's illness and contagiousness from your yard. Well this is impossible, chances are, you have PBFD in your yard already. I know I do, for Manau was from my yard, she put it out there long before I knew she had it.

What I did was genuine human compassion to these birds as has my vet and many others. We take them in. We can't beat PBFD, it has gone too far here. Most research says it either originated in Australia or Africa. I would say more than likely Australia. We have Cat Aids, Goat Aids. As we introduce many things into our environment, the Cane Toad, Mixamatosis, Calici Virus, Foxes, thank god we don't have Rabies..yet!!
I have my own opinion on where PBFD came from and why.

If you see a wild hookbill that is hanging around your home, that cannot fly, chances are it has PBFD. Up to you whether you leave it to an unatural predator, or you take it in. Most likely it will die anyway. Just depends how much we want it to suffer.