A Facebook post shows a photo of a wolf pack, with text alongside the photo explaining their formation.
It claims that while on the move the pack organises a formation based on strength, with the “alpha” wolf pulling up the rear and controlling the direction of the entire group, while the old and sick wolves set the pace at the front of the group.
While the photograph is real (taken from the 2011 documentary Frozen Planet filming in Wood Buffalo National Park, Alberta, Canada), the accompanying description isn’t accurate.
As this fact check by Snopes points out, the documentary explains that one “alpha female” leads the pack while other wolves follow to conserve energy. It is not correct that the wolves at the front are old or sick, or that the wolves at the back are the strongest.
The post has been in circulation online since at least 2015. The photo is incorrectly attributed to “Cesare Brai” but was actually taken by Chadden Hunter.