Wildlife watchers and social media followers rejoiced last month when, at long last, a hulking female grizzly bear named No. 399 emerged from a longer-than-usual hibernation at Grand Teton National Park. Even better: Ambling beside her was a single, blond-faced cub. There were two reasons for celebration. First, grizzly 399 was alive – a Wyoming hunter who had boasted of killing her months before had been bluffing.