I am assuming that this is a youngster without mum and dad to help.

I watched for ages as it tried to get food from the feeder.

It didn’t seem to know how to hang on and acted more like a Hummingbird flapping it’s wings,grabbing at the fat balls then returning to the fence. It carried on this behaviour for some time before being scared off by a large pigeon.

I expect it will learn quickly, nature is a wonderful thing.