LIFE HISTORIES OF NORTH AMERICAN WILD FOWL 301 



Columbia (Skeena River) and the central Mississippi Valley. Now 

 too rare everywhere to outline its range more dehnitely. 



Spring migration. — Average dales of arrival: Nebraska, jNIarch 

 16; South Dakota, April 2; Minnesota, Heron Lake, April 4; Sas- 

 katchewan, April IG; British Columbia, April 20. Late date of de- 

 parture : Arkansas, Helena, April 29, 1891 ; British Columbia, 

 Osoyoos, April 25. 



Fall migration. — Fall dates: Minnesota, Spicer, October 8, 1913; 

 Michigan, St. Clair Flats, November 20, 1875 ; Washington, Douglas 

 County, November 9, 1912; Colorado, Fort Collins, November 18, 

 1897, and November 25, 1915. 



Egg dates. — Arctic Canada: Five records, June 17 to July 9. 

 Alaska: One record, June 28. Alberta: One record, April 7. l)a- 

 kota : One record, June 4. 



