Sometimes you really do get lucky. The SF Chronicle reports that last month's wolverine sighting near Lake Tahoe wasn't a fluke.
Researchers have released 2 more photographs of wolverines, and believe they have over 50 hair and scat samples. Biologists will compare the samples with skins of California wolverines. If all goes right, DNA comparisons between these skins and the newly collected samples will reveal the Tahoe wolverines' identity. The wolverines' scat and hair should reveal their geographic origins. Until then, biologists cannot confirm that the wolverines are actually endemic to the Sierra Nevada. Some have suggested that the wolverines might have escaped from a captive population. While that is unlikely, scientist can't rule out that scenario without more evidence.
