Rufie still guarding

Yesterday, our wintering female Rufous Hummingbird attacked, at least four times, a poor innocent American Goldfinch that really wanted to drink from the ant-guard water reservoir on one of the hummingbird feeders. At each attack the goldfinch sort of fell off the feeder, flitted off a short distance, and then returned, only to be attacked again. The yard is full of water containers, and there are four other hummingbird feeders, but there was something about that one that made it special apparently.