"Previously treated as a synonym or subspecies of M. hirundo, Moulds et al. (2020) present molecular and morphological evidence for treating M. errans as a separate species, with M. hirundo no longer recorded from Australia." M. errans is found in "New South Wales, ....... Queensland .......Northern half of NT .... Torres Strait Islands, ... Norfolk Island, Tasman Sea; West Papua, Solomon Islands"
source - Australian Faunal Directory https://biodiversity.org.au/afd/taxa/Macroglossum_errans
Reference:-
Macroglossum errans is listed in the following regions:
Synonyms
Macroglossum hirundo