1. Hieracoglaux strenuus / Great 0wl of the Brushes (= Ninox strenua / Powerful Owl)
2. Hieracoglaux rufus / RuFous Owl. (= Ninox rufa / Rufous Owl)

G. J. Broinowski, Fecit

Date 1891
Source https://www.flickr.com/photos/biodivlibrary/17065712772
Author Gracius J. Broinowski (Gracius Broinowski)
Full title The birds of Australia,
taxonomy:binomial Ninox strenua
taxonomy:binomial Hieracoglaux strenuus
taxonomy:binomial Hieracoglaux rufus
taxonomy:binomial Ninox rufa
Source: https://commons.wikimedia.org/wiki/File:The_birds_of_Australia_(17065712772).jpg

The powerful owl (Ninox strenua), also known as powerful boobook, is a species of owl native to south-eastern and eastern Australia, the largest owl on that continent. The powerful owl lives permanently in breeding pairs once in adulthood. These owls have been observed roosting singly, in pairs and in family groups of 3 to 4. They frequently roost during the day on branches in tall, open trees, often while still holding the prey caught the prior night.

The rufous owl (Ninox rufa), also known as the rufous boobook, is a species of owl in the family Strigidae. It was described in 1846 by John Gould, an English ornithologist. Its common name reflects the rufous-coloured feathers that these owls are covered with in adulthood. While it is uncommon, the species has a wide range, including Australia, Indonesia, and Papua New Guinea.

Order: Strigiformes
Family: Strigidae
Genus: Ninox
Species: Ninox strenua (Latham, 1801); Ninox rufa (Gould, 1846)