Meaning Clue:
"Co-gurrock" gugarag = "Blue-faced honeyeater" honeyeater black-faced: Hunter Sketch Book [:113:] [BB]
Source Details:
The Hunter Sketch Book: Birds and Flowers of New South Wales drawn on the Spot in 1788 & 90 By Captain John Hunter RN of the First Fleet. General Editor John Calaby. Canberra, National Library of Australia, 1989