The youth retreat was this weekend, starting Thursday evening because the county schools were closed today (end of the grading period, or some such). I went up today, joining the group already there. At lunch time, some of us walked from the main building down to the house by the road. In the woods on the way down, I happened to notice these two blue jay feathers (Cyanocitta cristata). The blue in blue jay feathers is not because of any blue pigment but rather because of the physical structure that refracts different wavelengths of light differently. Either way, though, they are quite beautiful.