Smithsonian Report, 1911. — Keyes. 



Plate 6. 



■>^-<SH 



Fig. 1.— April 13, 1907; Age of Owlets, 32, 34, and 36 Days. 



Fig. 2.— April 1 8, 1 907; At the Base of the Old Nest Tree; Young 37, 39, and 41 Days Old. 



