Edit:
Just realized the correct name for the tree is actually maple.
False friend caused mistake because its name is "Ahorn" in German.
Keeping the heading as it is, because it is funny, although it might trigger the Canadians (sorry, dudes!).
I called them both helicopter and "pinch-nose" (pince-nez) cause you can open the seed pocket that is sticky and place your nose in place of the side. But that is not what is on the picture.