Number observed: 2
Black-capped x Mountain Chickadee (hybrid)Number observed: 1
Comments: The individual was with a small group of three Black-capped Chickadees. The bird was actually in the front yard of her house investigating a bird house. This is just South of the university. At first I was surprised to see a Mountain Chickadee with at group of Black-caps. Then I noticed it did not appear to have the typical markings and it did not make the typical calls a Mountain does. It had a very thin superciliary white marking much thinner than a typical Mountain Chickadee. The superciliary marking did not meet in the center and the bird had a black helmet the nape was white the black did not meet the upper grey shoulders. It was obviously different from the rest of the group. It was also calling like a Black-capped only making the fee-bee call. Never the typical repeating at the end fee-bee-bee... etc. of a Mountain. Then to my astonishment it actually copulated with a female Black-capped of the group. I did not get a photo of the bird but others should keep their eyes out for it and I will continue to do so.