YRW's Behaving at the Peanut Butter Bar

The Peanut Butter has been very busy of late, what with the ludicrously cold weather in the Piedmont (I think I heard it's been the fourth coldest winter since the 1940s.) There are a group of species involved, but the one that's really doing the most damage are the Yellow Rumped Warblers. True to form, once they get established on our property, they pretty much spend their time at this feeder. What we haven't yet established is whether they also take on an aggressive posture and drive out the competition. That was the case last winter, when one male became an intolerable nuisance. But from what I've seen, it looks like the lot of them are behaving and content with their haul. It all bears watching, though.