Apr. 30 75th Went to no. 6 at #1:30 P.M. Four of young were sitting in dead still at nearest end of bridge line of trees in which nest was located. The & only was present and fed occasionally but was greatly disturbed by our efforts to parts the young. She did little fussing and them only at a distance. Young rarely paid attention to scolding, but once seemed to quiet down. By moving quietly I could approach within 6 ft of young but then they made off through trees or flew faster one to the other. The left giving the scree note and once the female offhand sat up the eastway clamor. I do not hear the thin call of the jr bill - perhaps they were all too hungry and I was not close enough. They young are none without