Michael, It is the most common Nyctophilus to turn up in the ANWC Collection from the Canberra region and it certainly looks like geoffroyi. The other possibility is gouldi and they can best be told apart by the shape of the grove in the post nasal ridge, T shaped in gouldi and Y in geoffroyi. A really good close up of the face showing the post nasal ridge might have helped. Something to consider in future records.