Feisty Rufous Hummingbird

My wintering Rufous Hummingbird showed her seriously feisty self today. Apparently an Orange-crowned Warbler has discovered that sugar-water is a good supplement to nuts from the nearby feeder, especially on a cold (22 degrees) day. And "Rufie" does not like it. Numerous times during the day, the warbler hopped on to one of the hummingbird feeders and drank with some effort through the narrow holes, and almost always it was attacked by Rufie. During one instance the warbler was knocked off a nearby branch by the dive-bombing Rufie. Mostly the warbler fended off the attacks with a wide-open bill and held her ground. Later today, as darkness began to fall and Rufie's efforts did not dislodge the warbler from the heated feeder (heat lamp), they finally came to a resolution and both drank deeply from the feeder at the same time, one on each side of the feeder. Tonight is expected to get down to 15 or 16 degrees, so they both need all the calorie intake that they can get.