Spinning silver 'diamond' shaped roof ornaments?

[Mick-Kelly]

A question borne of curiosity. I have noticed small spinning reflective diamond shaped objects on the roofs of several buildings in the CBD of Brisbane. Does anyone know what the are or what their function is?

[digger]

A question borne of curiosity. I have noticed small spinning reflective diamond shaped objects on the roofs of several buildings in the CBD of Brisbane. Does anyone know what the are or what their function is?

I think they are to scare off birds.

[It'sNotWorthComplaining!]

Oh Those , that's were those people work that go oooommm and meditate a lot. It's something about the power of crystals and enlightenment. feng shui

[tonic]

Alien communication devices, you weren’t supposed to notice until the mother ship arrived, now will have to suppress you.:D:D:D

[TimNZ]

Hiclones for buildings?