Here's how I do it. Using a tripod and a remote shutter release, I place the tripod so that it is close enough to the feeder to avoid having to crop excessively. Use masking tape to block off the feeder holes that would place the bird out of view. Aim the camera to catch the bird at the available feeder hole making sure the background is acceptable. Use a large aperature to reduce the depth of field and blur the background. Use manual focus to assure sharpness and reduced shutter lag time. Shoot in the fastest burst speed available. Take a LOT of shots. Some will turn out good

I know of 0 that have failed. However, I use a similar system that cost $0 and has never failed me.

I extended my camera strap using discarded narrow web straps from old cameras so that my camera rested at my hand. Placing the slick side of my Canon strap down, the strap slides easily when I raise my camera to shoot.

As when using any equipment, ALWAYS check your equipment before the shoot to make sure you have everything you will need and that it is I good working order.