For the second year, a family of peregrine falcons has nested at the top of one of the brick columns of the Evanston Public Library. The library staff has set up a FalconCam that uploads a picture of the nest every two minutes during daylight library hours. We’ve become falcon junkies; Margaret and I trade messages several times a day, noting exciting developments, checking for the adult birds’ presence, observing the personalities of the fledglings. . . .