I have never seen a squirrel on the hummingbird feeder before and thought it looked quite amusing, so grabbed a couple of shots. I was not quite so amused when I went to fill the feeder later and saw that the squirrel had removed with its clever little hands and sharp claws, two of the yellow plastic parts that the hummingbirds feed from. I managed to find them and put them back and I hope it does not happen again!