The most frequently cited example is that of the extinct passenger pigeon and its parasitic bird lice "Columbicola extinctus" and "Campanulotes defectus". Recently, "C. extinctus" was rediscovered on the band-tailed pigeon, and "C. defectus" was found to be a likely case of misidentification of the existing "Campanulotes flavus". However, even though the passenger pigeon louse was rediscovered, coextinctions of other parasites, even on the passenger pigeon, may have occurred. Several louse species—such as "Rallicola extinctus", a huia parasite—probably became extinct together with their hosts.