These guys provided excellent opportunities for a couple of weeks recently, peaking with about 30 individuals before things slacked off. The trick was to wait until some made their way lower and to the outer edges of the ornamental crabapple trees. This obliged nicely.
Canon 7DII + 500mm f/4 II + 1.4TC III, manual exposure, evaluative metering, 1/500s., f/5.6, ISO 1600, natural light (with some bouncing off the snow below), handheld, FF, eye work to darken the pupil and clean up the reflections.