Taking an image in a zoo and noting the species that is written on the cage is different from just taking an image and having other people guess what species it might be.
Good example actually. From the "by the book" perspective, the zoo picture is better because it has a label beside the cage that can be cited.
From the "ignore all rules and just create a great encyclopedia"
perspective, the in-the-wild picture is better because it shows the species in their natural habitat.