@ Charlie Spencer "Respectfully, was he actually eating berries or did you assume that's what he's doing? " That's a good questions. He was up very high and moving a lot so I was having difficulty following him. At one point I thought I saw something red in his mouth that looked like a small berry. However, this tree has acorns not berries. But, there is a Brazilian Pepper Tree close by which has little red berries. I suppose he could have flown over with the berry in his mouth. The short answer is I assumed that's what he was doing. I just looked that up on the Cornell site and it looks exactly like the little bird I saw! Thank you, Charlie and Geoff!