The VG Resource

I need help answering this riddle because I am a sir and can't figure it out.


Some Japanese castles have a special feature built into their floors, causing them to chirp when you step on them. This makes moving around undetected a challenge for a shinobi. Commonly in English, they are named after a melodious songbird, but what is the Japanese name for these floors?

The answer isn't Tatami either, I have tried that.

Nightingale floors, or uguisubari.

Ark wins~

http://www.squiby.net/create/30780

It was because I wanted this, Thanks for helping I don't know of any other riddles to stick in here so if you think of somethis could turn into a fun riddle thread.