It wasn't Jim Harbaugh's brash persona or Colin Kaepernick's sporadic arm - it's been the curse of the Raven haunting the 49ers.
Or whatever the heck this downright horrifying black bird is.
The NHL's Stadium Series webcam uncovered the source of the 49ers' woes since losing Super Bowl XLVII while filming timelapse footage for Saturday's outdoor game. And it might affect your sleep tonight.
- with h/t to For the Win