Miniopterus orianae oceanensis

10 Eastern Bent-wing, Large Bent-wing Bat at Kambah, ACT

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Identification history

Miniopterus orianae oceanensis 27 Mar 2026 MPennay
Miniopterus orianae oceanensis 26 Mar 2026 regeraghty

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User's notes

These appear to be Common Bentwing Bats Miniopteris schreibersii, which are found in the ACT according to one reference book. Possibly Eastern Bent-winged Bat Miniopteris orianae. The same book says that the Little Bentwing isn't found in the ACT but is listed here.

5 comments

HelenCross wrote:
   26 Mar 2026
Wow - 300!
maura wrote:
   27 Mar 2026
Have you known about this colony for some time and been able to watch them leave at dusk for food foraging? It must be a sight seeing that many leaving all at once. Thank you for some wonderful photos.
DonFletcher wrote:
   27 Mar 2026
@MPennay have you seen this? If this is the only roost of this species or one of few, is it worth checking how well they are protected from exotic predators, human disturbance or effects of maintenance work? Is it worth informing ACT Roads?
MPennay wrote:
   27 Mar 2026
That's an outdated reference book. Miniopterus schreibersii is restricted to Eurasia. The local species is Miniopterus orianae oceanensis.
This isn't a breeding congregation, or colony it's bats dispersing and migrating from Wee Jasper at the end of the breeding season. There are about 30,000 on the move at the moment
regeraghty wrote:
   30 Mar 2026
@maura To Maura - no, this is the first time I've seen them, and from what is stated elsewhere, they are just roosting temporarily on their way to the coast. It was very dark by the time they started to leave, and they didn't leave all at once. It was fascinating to see all the same. I've only seen a small roost like this before in an old train tunnel in Queensland. I have seen a large colony going out to feed at Mammoth Cave in the USA, where there's thousands of microbats all flying out of the natural entrance of the cave in the evening. Another spot in Queensland is Mt Etna near Rockhampton where there's a large breeding colony of microbats, as well as endangered Ghost Bats. I've added another sighting from the following night.

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