It would indeed be strange to generalize a study on Pandas to all bears, which is why the paragraphs after the discussion of Panda bear diets discusses similar

It would indeed be strange to generalize a study on Pandas to all bears, which is why the paragraphs after the discussion of Panda bear diets discusses similar research in sloth bears, polar bears and grizzly bears. It's a lot easier to generalize to "all bears" when you have convincing studies of 4/8 species of bears (but only, to my count, ~10% of the global bear population because there are a lot of American Black Bears).