Board Thread:General Discussion/@comment-24024793-20131018194114/@comment-4975807-20131018205306

A species is the name for what a creature's classification falls under. In the case on the wiki, species of creatures we know that more that just one creature in the species exists. For example, mermaids and giants are species because we've seen more than one of each. When you're talking about a creature, the wiki tends to keep human-made animals and magical creatures we have only seen one kind of (like the White Rabbit) to be listed only under Creatures.