This video from the USA says about itself:
24 August 2016
Ruby Throated Hummingbirds enjoy watching over their territory around feeders while “swinging” from this attractive Hummingbird Swing Perch. This is the Songbird Essentials SEHHHUMS Copper Hummingbird Swing from Amazon. Attractive, but a bit pricey at $12 – it works and looks good on a porch or deck. I like the wood and copper look.
As you can see in the video there is no shortage of natural perches near the feeders so I was delighted to see this get used as much as it does. It tends to be used most often in the morning and early evening when the hummers are most active.