Well, yeah, as far as Nat Geo’s sources are all urban legend. As there are records of crocodiles eating humans throughout the history of, um, history, I’m pretty sure Gustave has partaken in more than his fair share of fleshmeats, especially given the overfishing of his river in Burundi.
I mean, really, National Geographic could be 100% urban legend and no fact, but from what I’ve independently investigated and corroborated with sources I believe to be credible, I’m pretty sure it isn’t.
For all I know, unicorns and pixies and leprechauns and hydras exist. Sometimes what’s called a “fact” is repeated and supposedly true speculation. Maybe other crocodiles have eaten humans in Gustave’s range (several have been hunted after children have gone missing and found to have human remains in their stomach). Maybe Gustave is multiple crocs. Reality is hard to suss out sometimes. But I’m pretty sure he’s real, and he’s just one individual, one human-flesh-loving individual.