the offering is made in the manner to which they have become accustomed. Thus on the present occasion, with three of us standing in a close group, after the birds had overcome their initial shyness on our entry and were flying from their perches to my hand for worms, an offering by Dr. Reynolds (of the only worm left) was accepted in exactly the same way, with the same promptness and lack of restraint. The notes immediately following cover the first carefully ob- serbed change of shift performed by Brownie and his new mate, the times are accurate within a half minute at least. Brownie was in the nest. 11:45. Nova, to the north, calls: Scrip, scrip, script, this being the only sound made by her during the change as far as could be determined. B answers instantly: Pit-yoorki, pit-yoorki, berra-chee-cup berra-chee-cup, ber-cheet, ber-cheet, ber-cheet. (The yoor plaintively and the cheet loudly and imperative- ly). 11:48. B calls softly: Ber-cheet, ber-cheet, yerrick, yerrick. 11:52. B softly: Chooh, chooh, berra-cheet. 11:53. " " : Yerk, yerk, repeat, repeat. 11:54 " " : Yoor-a-wheet, yoor-a-wheet, yer-r-rk, yer-r-rk. 11:55. " " : Pe-cheerit, pe-cheerit, pit-yurkit, pit-yurkit. 11:55½ " " : Yer-r-ick, yer-r-ick, berra-tsee-cup, berra-tsee- cup, pit-it-cheenk, pit-it-cheenk. 11:56½ " " : Pit-yerkit, pit-yerkit, repeat, repeat, ter-ter- cheenk, ter-ter-cheenk, turk, turk. 11:56½ Confused warblings mixed with berracheecups, ter-ter- tinks and turks. Nova enters nest and B comes to me in the glade. May 3rd. No early morning song heard. The young birds at R's very tame and friendly. About 11:30 one of them was heard practicing his undersong. The