I recently photographed this Rufous Hummingbird gathering nesting materials from the cattails at the Earth Sanctuary on Whidbey Island. It kept coming back to the same cattail where it would grab some of the fluffy material from the top of the cattail and would then fly off for a little while. I assume it was taking the fluff somewhere to use as part of a nest.
Since the bird kept coming back to the same cattail, I was able to set my camera up on a tripod and point it at the cattail in anticipation of a return visit. I then focused the camera on the hummingbird the next time it came back to the cattail for a couple of seconds. Once that was done I just waited for it to make some return visits and snapped some photos each time it returned. The shutter speed of 1/500 sec wasn’t fast enough to freeze the birds wings, so even though the birds head is in focus and not moving, the wings have an interesting blurred effect.