>>2928970
your roof will speed up wind like an airplane wing, and these whirl birds are powered by both outside wind but if no wind they can be powered by the hot rising air itself.

plus I just think they are cool.

Attach a couple (for balance) of solar powered lights, just for fun.

but assume WTF the sellers just got rid of enough to get you to buy will be coming back hard and fast.

figure the spores are EVERYWHERE.