Galahs in the North-West: Are my eyes deceiving me?

I've seen a couple of billion galahs in my life, and even owned a hand-ful of them as a kid.

I've hit a few of them on the road too because I've never - until recently, seen them fly in a straight line. They can take off from the roadside in front of you and fly out west or east only to cavort and veer right into your path at the last minute - I even had one put a dent in a rear door once, and a whole flock kamikazi into the windscreen on another after being well clear.

This behaviour seemed endemic in the species. It is as if their moto is "Never fly in a straight line if you can have fun taking a more cavorting path". I have seen it so many times as to be able to clearly discern a galah or flock thereof at a great distance, from other cockatoos with which otherwise they might be confused.

However, I was in the Kimberley in May and just had to check that my eyes were still in the right place in my head - not once, but numerous times, galahs and flocks of them were seen flying in a straight line...

My optic nerves still seemed connected and if my eyes were deceiving me, they were doing a damn good job at it.

Has anyone else noticed this? Is this documented?

Cheers
Andrew who is ready to be told he is smoking stuff... but perhaps it is just the southern galahs are on something the Kimberley galahs ain't found out about yet?