Normally the males arrive first, stake out territory and then the females come in.
I had a peak hummingbird experience this morning. I had refilled the feeder and when I went out on the patio there was one of the males looking at the hook where the feeder goes. When I got closer to the hook the little guy flew down and started drinking out of the feeder while I was holding it. No witnesses except the cat and he ain't talkin'.