I'd set my camera up on the tripod earlier, so as I sat and watched, the Humming Birds arrived. It was then just a push of a button to release the shutter from the comfort of my chair 15 feet away.
Pretty pleased with the results!
Shot at ISO 400 with a Nikkor 70-300mm F5.6 @250sec. AF was set to Continuous using the 51 point Dynamic AF on my Nikon D750.