Yes. However, there are some brownish moths on the ALA (not good photos) which have been identified as C. rhynchota eg. see https://biocache.ala.org.au/occurrences/0480b628-f07d-4caf-afba-783a85544a68 The set specimen of C, rhynchota photographed on Lepidoptera Butterfly House looks brownish, not grey.