Hummingbirds are fascinating, and a worthy challenge to photograph.
I was looking for elk (in Rocky Mountain National Park), but this broad-tailed hummingbird was consistently landing on the same branch, and spending a few moments waiting for that to happen resulted in some nice images.
Hummingbirds are tiny, and despite getting relatively close with the Sony FE 600mm f/4 GM OSS Lens mounted, I was still focal length limited. As I said in the just shared mountain bluebird image, a high pixel density imaging sensor can save the day when deep cropping is required. The Sony Alpha 1's 50 MP resolution provided a good enough final image resolution.
A larger version of this image is available here.