Photos by Mark Roberts, President of Friends of Napier Park.
Duplicated observation 2 of 2. This is an observation about the prey.
Trees are, I think, Forest Red Gum, Eucalyptus tereticornis. About 120-150 mm trunk diameter.
What caused the damage, and what were they after?
Predator page: https://inaturalist.ala.org.au/observations/95635781