User blog comment:CNBA3/Dragon's Location Theory!/@comment-24066070-20140709124528

Just like some others have pointed out, I also think the surviving Dragons live in remote areas like vulcanoes, deserts, arctic areas, etc etc.

But they certainly did/do live in Earthland, since the Eclipse Gate was connected to the Earthland's past and not some unexplored Dragon world/dimension.

Remember Zirconis said that all Dragons can use Magic, so perhaps they make themselves invisible or use some other form of magical disguise.

They may also just avoid humans. Given the fact they have heightened senses, they likely smell or hear any approaching humans from miles away and then disguise themselves or flee.