I hear Red-Eyed Vireos all the time. They are fairly loud for a small bird, and often in the tree tops, hidden in among the leaves. I have seen them a few times, and never had a chance to get a decent photograph. On a hike through my new local patch in Vermont - Dead Creek WMA - I heard several Vireos as usual. I think they are teases, their calls saying, "hey you, up here, look up"
Well I lucked out and came upon what I assume to be a juvenile as it's call was more a whine and it seemed to have zero apprehension as I slowly approached. I sat down in the grass and watched it for five minutes from 10 feet away. I got closer than the photos would indicate but I ran out of batteries and the spare never went into my pocket as per usual routine. This forced me to look only and I feel I got to know this bird a bit better than I otherwise would. Imagine how many shots I might have had with a working battery.