when I was employed ( no mention of the W word here) my company was doing a pipeline job near Devonport in Tassie. We were ground to a halt by an environmental study about Orange Belly Parrots. Why? they may have flown into our trenching machine. It was 3.5metres high and travelled at maybe 3km per hour. This delayed us for about 3 weeks from memory until we could prove the utter stupidity of such study. The birds could easily negotiate the Bass Hwy and Greater Melb, but not us.

Thanks Bob - While I've seen most of these birds in other clips & also the ones that occur in Northern Australia, it's pleasing to see this production.

Generally the males are brightly coloured - they have to attract a mate & she wants the best male to pass his genes along to her offspring. Often the female birds raise the young alone, sometimes both sexes look after them. They need camouflage to prevent them from being eaten while sitting on the nest.

Yes, I agree with you too Craig as far as setting up surveys where all parties understand each other's needs but our a lot of our native birds, animals & marsupials are suffering SEVERE habitat destruction. The swift parrot has another enemy too - the sugar glider that was not in Tasmania before & is now. They eat the young birds in the nests, occasionally the adult(s).
And we have a "famous" bird in our area that played havoc with the Adani Mine - the southern species of the black-throated finch. Once it was found from central NSW to North Qld but now the strong holds (flocks of 8-20 birds) are near Townsville & in Adanai's area! You could come out on a survey if you're around Townsville in mid October!! It's a bit warm then.

Before you ask why do a lot of birds live in one country, state & fly to another to breed - I don't know! Perhaps it's the climate, the amount of feed required.
We have several visitors to Nth Qld that come from PNG eg the dollar bird, the buff-breasted paradise kingfisher as well as the waders that breed in the Tundra areas of Asia, Alaska & feed in the southern hemisphere. They travel well known Fly-ways. Some like the bar-tailed godwit have been tracked flying non-stop (over 6500miles)!

Years ago in the Portland Vic region, Yambuk, the greens were objecting to the building of wind towers because they were in the path of the Orange Bellied parrots. Now the same greens are silent on the fate of the very same Orange Bellied Parrots. Hmmm.