Titanomis sisyrota is probably the rarest moth in New Zealand.
- Titanomis is quite big, with a wingspan of 55-63 mm.
- Only 10 have ever been found, and none since 1959, when 1 was caught at floodlights on the Waipapa Dam.
- Some other moths are known from fewer specimens, but most of these are very small, and easily overlooked.
- So unusual is Titanomis that experts don't even know which group of moths it belongs to!