JSirli '^ lore 



November- December, 1921 



CONTENTS 



GENERAL ARTICLES pace 



Frontispiece ix Color. Rusty Blackbird; Brewer Blackbird. .Louis Agassk Fuertes. . 



A DoLBLE Tr.^gedy. Illustrated ' Dr. and Mrs. F. N . Wilson. . 281 



Wh.\t Birds Signal with Their Tails? Ernest Thompson Seton. . 286 



Ctn-Tiv.4TiNG the Birds. Illustrated Craig S. Thorns. . 287 



Billy, a Great PIorned Owl Dell Coleman. . 293 



The Migration of North American Birds. X\TI. Rusty Blackbird, and Brewer 



Blackbird Harry C. Oberlwlser. . 295 



Notes on the Plumage of North American Birds. Sixty-second Paper 299 



Frank M. Chapman. . 



Bird-Lore's Twtnty-second Christmas Census J. T. \iehols. . 300 



NOTES FROM FIELD AND STUDY 301 



Ontario Notes (IIIus.), Mary D. Pcrley; Bird Observations Dl-rixg a Mild Winter 

 IN Central Oklahoma. Marmret M. Nice; Minnesota Migration Notes. Homer Collins; 

 American Egrets in New Jersey, .Arline B. Hooker; .Scarcity of Nighthawks, J . E. H. 

 Kelso, M.D.; Olive-; ided I'"lyc.\tciier on Long Isl.and. C. M. Lo'u-erre; A Friendly 

 Wood Pewee, Beatrice Sawyer Rossell; Robin and Sn.\ke, W. A. Marshall. 



THE SEASON. XXVIU. August 15 to October 15, 1921 304 



Winsor M. Tyler; J. T. Nichols; Julian K. Potter; Barry C. Obcrholser; Lynds Jones; Colin 



Campbell Sanborn; Thomas S. Roberts; Harry Harris; W. H. Bergtold; Amelia Sanborn 



Allen; Frances B. Schneider. 

 Annu.\l Congress of the American Ornithologists' Union 316 



BOOK NEWS AND REVIEWS 317 



Bent's Life Histories; The Auk; The Condor. 



EDITORIAL 



319 



THE AUDUBON SOCIETIES— SCHOOL DEPARTMENT 320 



Concealing Coloration in Birds (IIIus.) . .1 . .1 . Allen; For .and From Young Observers. 



THE AUDUBON SOCIETIES— EXECUTIVE DEPARTMENT 329 



SE\i;NTEENTII ANNUAL MEETING; MORE F'eUER.VL BiRD RESERVATIONS. 



ANNUAL REPORT OF THE NATIONAL ASSOCIATION OF AUDUBON SOCIE- 

 TIES FOR 1921 m 



*i^* Manuscripts intended for publication, books, etc., for review and exchanges, should be sent 

 to the Editor, at the American Museum oj Natural History, 77th St. and 8th Ave., New York City. 



Important Notice to All Bird-Lore Subscribers Whose 

 Subscriptions Expire with this Issue 



"DIRD-LORE regrets that it cannot send its next issue to subscribers whose sub- 

 ■*^ scriptions expire with this nurrber, until they have renewed their subscription. 

 The size of the edition of each iesue is detern ined by the number of actual subscrib- 

 ers at the time of publication, and if you would have your set complete we would 

 advise an early renewal. Should you decide not to renew, will you not kindly notify us ? 



Notices of chanEes of addresses, renewals and subscriptions should be sent to BIRD-LORE, 

 HARRISBURG. PA. Each notice of a change of address should give the old address as well as 

 the new. and should state whether the chanee is permanent or for only one or two issues. Make 

 checks and money orders payable to BIRD-LORE. 



Entered as second-class matter at the Post Office at Harrisburg, Pa., under Act of Congress of August 24. iQia 



