The question goes unanswered... "Firefly" or "Firebug"?

Member Kazuko Green says that they teach the term “firebug” in Japan, using British English. Seeingly strange to my ears. Trying to understand, we used Wikipedia to check. It says “firefly” is used in North America. OK’ then.

But today a British newspaper (DailyMail) published shown some wonderful images taken in Okayama Prefecture. Click Here to take a look. If you have time, check out the photographer’s blog (link on the newspaprer page).
Bob Green