Agrotis infusa
2 Bogong Moth, Common Cutworm at Duffy, ACT
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| Agrotis infusa | ibaird | 26 Sep 2026 | |
| Agrotis infusa | patrickcox | 26 Sep 2026 |
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Significant sighting
MichaelBedingfield noted:
27 Sep 2026
Bogong moths made the national news tonight, surely significant.
User's notes
Personal observation through thermal scope: 150 per minute passing over 30m wide east/west line above my house, flying at about 100m per minute.
Very rough calculation of total moth numbers:
BOM weather radar cloud of moths 250km x 700km.
1,250,000 per minute over 250km east/west line.
70,000 lines 100m apart in 700km.
4,900,000,000 moths.
8 comments
26 Sep 2026
OK. we will have to ake your word for it! Are you an expert in mapping Bogong Moths flight patterns in this manner?
26 Sep 2026
In our Watson neighbourhood, there were a lot of moths actively flying around at about rooftop level (10-20m) after sunset on 25 September. Their size, flight behaviour and abundance suggested to me that they were Bogong moths.
26 Sep 2026
My estimation of 5 billion is for the full number flying at night between the Queensland border and the Snowy Mountains, since the density is so great they are showing up on the BOM radar. It is only a very very rough estimate based on my 5 minute observation at a single location
29 Sep 2026
Thanks for the info and for letting us know that their density was so great that they were showing up on the BOM radar. Which colour was it appearing as? I guess we won't ever know the true number but it may well be in the billions, which is a good thing to see again.
30 Sep 2026
Thanks for the extra image. I presume the blue areas are of the moth and not normal rain clouds?
Location information
- Coordinates 149.030495-35.334276
- Places Duffy, ACT
Sighting information
- 750 Abundance
- 25 Sep 2026 11:30 PM Recorded on
- patrickcox Recorded by
- 25mm to 50mm Animal size
Collections
- patrickcox NatureMapr Canberra & Southern Tablelands Latest Agrotis infusa Significant Featured Noctuoid moths (except Arctiinae) Moths (Lepidoptera) Insects
Species information
- Agrotis infusa Scientific name
- Bogong Moth, Common Cutworm Common name
- Not Sensitive
- Migratory
- Non-invasive or negligible
- Up to 2159.76m Recorded at altitude
- External link More information
Record quality
Quality score
6 / 7
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- Nearby sighting(s) of same species
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