THE CONDOR 
A Magazine of Western Ornithology 
Published Bi-Monthly by the Cooper Ornithological Club 
Entered as second-class matter November 29, 1919, at the post-office at Berkeley, 
California, under Act of Congress of March 3, 1879 
Issued from the Office of THE CONDOR, Museum of Vertebrate Zoology, Berkeley, California 
SUBSCRIPTION RATES 
Two Dollars rer Year in the United States, payable in advance. i. eee 
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COOPER CLUB DUES 
Two Dollars per: year for members residing in the United States. 
Two Dollars _and Twenty-five Cents in all other countries. Lu 
Manuscripts for publication, and Books and Papers for Review, should be sent to -the Editor, J. GRINNELL, 
Museum of Vertebrate Zoology, University of California, Berkeley, California. 
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within thirty days of date of issue. 
Cooper Club Dues, Subscriptions to The Condor, and Exchanges, should be sent to the Business 
Manager. 
For the Purchase of Back Volumes of The Condor or of the Pacific Coast Avifauna series, apply to the 
Business Manager. 
W. LEE CHAMBERS, Business Manager, Eagle Rock, Los Angeles County, California. 
He Issued December 4, 1920 
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CONTENTS | ; 
Phe Wine Claw in Swifts 9s) 90 oS oo eee a Alezander Wetmore 197 
Nesting of the Olive-sided Flycatcher in Berkeley, California (with three | 
photos) 2s. csssctecte ates teecrreeirieencrlaor Socal cele ee 
e 
FROM FIELD AND STUDY 
The Probable Breeding of the Aleutian Tern in Southeastern Alaska— 
a: QUOT ee ee a a nn ea I. Seymour Hersey 203 
Comments upon the Safety of Sea Birds and upon the “Probable” . Oc- 
currence of the Northern Bald Eagle in California......@. Willett 204 
Hastern Fox Sparrow at Seattle. ca view. Vea hee Thos. D. Burleigh 205 
The Yellow-headed Blackbird Flocking with Brewer Blackbirds... ao ee 
Frank N. Bassett 205 
Note on the Nesting Habits of the Osprey in Yellowstone Park................ 
Claude Gignoux 205 
4 a ema*'s 
Some Nesting Habits of the Pied-billed Grebe.............. Griffing Bancroft 206 
The Orange-crowned Warbler a Possible Winter Resident at Seattle, 
Washinetom jee ieee os Se ae Thos. D. Burleigh 206 
Notes on the Calliope Hummingbird....................-.-2.2....- Petes L. EH. Wyman 206 
EDITORIAL NOTES AND ‘NEWS. ee 
MINUTES OF COOPER CLUB MEETINGS a eae ea 
INDEX TO VOLUME XXU 2. cee neice dent aaa fee 
