He estimated it was more than 1.5 metres [almost five feet] long and weighed about 35 kilograms [77 pounds].
A scientist with a 30-year interest in big cat research, Bernie Mace, sent the 600 millimetre long tail to Monash University for testing.
. . . .
"The animal was big enough to be a significant threat to perhaps some of the small wallabies and I think the knowledge that feral cats grow to this size in our wild regions has got to be taken seriously and understood from an ecological point of view," he said.
Image credits: Canadian Big Cat Email Rumor, available at Snopes, borrowed for news-reporting and comment purposes.