Point taken (well taken!) about not including the camera and lens for my shot. It's a 5Diii with a 400 DO and a 1.4X extender. This isn't a lens forum so I won't say too much except that I think that the 400DO is one of the best kept secrets of Canon's lenses. It is light, relatively compact, and ultra-sharp, and obviously mates well with the 1.4X extender. When it came out about 10 years ago it got a very bad reputation, but if it had bugs back then it sure doesn't today. I love that lens.
I wish I had humming birds in my backyard. Great shot. I am suffering from white lens shoulder and would not mind a light lens. Here is a 100% crop from my 5DIII with the 300mm f/2.8 II + 2xTC III at f/5.6, iso 320 1/6400. It is so sharp you can see the dragonfly in the beak of the little egret at about 40 metres, taken yesterday.
5D IV, 5DS R, 7D II, EOS-M, Powershot G3 X, 400mm DO II, 300/2.8 II, 1.4xTC III, 2xTC III, EF 1.8 STM, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye