SWAINSON'S HAWK 235 



Colorado — Denver, March 9; El Paso County, March 11; and 

 Boulder, March 31. Wyoming — Yellowstone Park, April 18; Lara- 

 mie, April 23 ; and Cheyenne, April 27. Montana — Terry, March 23 ; 

 Fortine, March 28; and Billings, April 3. Alberta — Flagstaff, 

 March 15 ; Alliance, March 28 ; and Camrose, March 31. California — 

 Escondido, March 10; Fresno, March 14; Pala, March 17; and 

 Pomona, April 4. Oregon — Lake Malheur, April 17. Washington — 

 Seattle, March 7; Grand Dalles, April 16; and Tacoma, April 27. 

 British Columbia — Okanagan Landing, April 11. 



A late date for departure from winter quarters is April 17 (1921), 

 when one was seen over the summit of the Sierra San Xavier above 

 Tafi Viejo, Tucuman, Argentina. 



Fall migration. — Late dates of departure in the autumn are: 

 Alaska — Juneau, September 7. British Columbia — Okanagan Land- 

 ing, October 15. Washington — Walla Walla, October 16. Oregon — 

 Cold Spring Bird Keserve, October 14. California — Saticoy, Octo- 

 ber 2; and Fresno, October 15. Alberta — Flagstaff, September 17; 

 Andrew-Beaver River, September 23; and Calgary, September 29. 

 Montana — Fortine, October 29; and Bridger Mountains, November 

 18. Idaho — Spring Creek, October 31. Wyoming — Powder River, 

 September 24; Fort Laramie, September 26; and Yellowstone Na- 

 tional Park, October 3. Colorado — Baxter Pass, September 23; and 

 Beulah, October 20. Arizona — Camp Grant, September 28. New 

 Mexico — Bear Springs Mountains, September 29; Laguna Magda- 

 lena, September 29; and Datil, October 15. Saskatchewan — Indian 

 Head, September 28; and Eastend, October 12. Manitoba — Shoal 

 Lake, October 2; Aweme, October 6; Reaburn, October 17; and 

 Margaret, October 18. North Dakota — Charlson, October 19; Ant- 

 ler, October 23 ; Harrisburg, November 1 ; Kindred, November 9 ; 

 and Grafton, November 14. South Dakota — Arlington, October 19; 

 Harrison, October 26; and White River, November 2. Nebraska — 

 Hillsdale, October 10; Nebraska City, October 12; Gresham, October 

 15; and Lincoln, October 27. Kansas — Lawrence, October 10; and 

 Cimarron, November 1. Oklahoma — Tulsa, October 15; Norman, 

 October 17; and Fort Sill, November 1. Texas — Fredericksburg, 

 October 11; Bee County, October 23; Somerset, October 26; and 

 Corpus Christi, November 15. 



The southward flight of these hawks is well illustrated by the 

 record of one banded at Red Lodge, Mont., on September 19, 1916, 

 and killed near Bogota, Colombia, on October 29, 1916. 



Casual records. — ^While there are several records for Swainson's 

 hawk in the eastern part of the continent, the species can be consid- 

 ered only as a casual east of the Mississippi River. Among these 

 occurrences are : Ontario, a specimen was collected at Moose Factory 



