Yes, the little tigers are at times, fearless of human or bird. I have them come up within three or four feet of me.
It seems that they are trying to talk to me, with there "nock...nock" sounds, while hovering in place, looking at me.
I certainly enjoy the six or eight that we have in our yard. It tickles me to see them by two's all of a sudden shoot straight up in the air forty or fifty feet, and then dive straight down and arching back up just before hitting earth.
I've been able to get a few good pictures of these amazing and beautiful creatures. Each day I go out and sit about five or six feet from the feeders that we have out for them, and it seems that they too enjoy my presence.
They seem to have very little fear of me being there, talking with them and watching them.