A cluster of about 10 feathers or so. I was a bit puzzled until I saw http://canberra.naturemapr.org/Community/Sighting/3342813
Looks like one of Red Hill's Tawny Frogmouths came to a grizzly end. Might have an impact on breeding this year.
I saw a white domestic cat hiding in a garden shrub the other day, looking to pounce on this small group of red rump parrots. No good, I chased the cat away.