is not accepted by birds

Unfortunately, the feeding column is not accepted by the birds.
As already wrote a another reviewer, the birds do not want to put on the rails, instead they always fly to the glass and ran stumble.
In addition, my thing is already 2x fell down. On my balcony, it is windy, the thing starts to swing (this falls much food out) and then falls down, now it is thus now broken.
For me, so pretty expensive scrap.
FAIL