1412 U.S. NATIONAL MUSEUM BULLETIN 237 part 3 



Migration.- — The data deal with the species as a whole. Early 

 date of spring arrival are: District of Columbia — average of 33 years, 

 March 3. Maryland- — Laurel, January 23 (median of 6 years, Febru- 

 ary 15); Baltimore County, January 26. Pennsylvania- — Pittsburgh, 

 February 29; State College, March 1 (average, March 25). New 

 Jersey — Cape May, March 5. New York- — New York City, February 

 18; Chatauqua County, March 20. Connecticut- — New Haven. 

 February 25. Massachusetts — Martha's Vineyard, March 4. New 

 Hampshire — New Hampton, March 11 (median of 21 years, March 

 30). Maine— Bangor, April 1. Quebec — Montreal area, March 24 

 (median of 37 years, April 14). New Brunswick — Fredericton, March 

 21; Kent Island, March 24. Newfoundland, March 10-April 8. 

 Kentucky- — Bowling Green, February 12. Illinois — Urbana, Febru- 

 ary 13 (median of 20 years, March 1); Chicago, March 11 (average 

 of 16 years, March 24). Indiana- — Wayne County, March 10 (median 

 of 11 years, March 21). Ohio- — central Ohio — March 1 (median of 

 40 years, March 13). Michigan- — Detroit area, March 18 (mean of 

 10 years, March 22) ; Battle Creek, March 24 (median of 18 years, 

 April 7) . Ontario- — London, March 24 . Iowa — Scott County, March 

 12; Sioux City, March 22. Wisconsin— Racine, March 17. Minne- 

 sota — Minneapolis-St. Paul, March 12 (average of 10 years, March 

 25). Nebraska- — Dunbar, March 4. South Dakota — Sioux Falls, 

 April 11. North Dakota- — Berlin and Harwood Township, March 25; 

 Cass County, March 25 (average, April 2). Manitoba — Treesbank, 

 April 9 (average of 21 years, April 19). Saskatchewan- — Indian Head, 

 March 29. Mackenzie — Fort Simpson, May 1. Colorado — Dur- 

 ango, April 24. Wyoming — Fort Bridger, April 14. Idaho- — Moscow, 

 March 8 (median of 11 years, March 31). Montana- — Great Falls, 

 March 7; Libby, March 16 (median of 10 years, April 1). Oregon — 

 Malheur Refuge, April 1. Washington — Bellingham, March 1; Sea- 

 beck, March 24. British Columbia- — Sumas, April 22 ; Atlin, April 27. 

 Yukon — Sheldon Lake, May 4. Alaska — Wrangell Island, April 22. 



Late dates of spring departure are: Florida- — Tallahassee, March 16; 

 Pensacola, February 17. Alabama — Wheeler Refuge, April 7; Gads- 

 den, April 6; Jackson, March 29. Georgia- — Atlanta, April 2. South 

 Carolina — Clemson, March 29 (median of 6 years, March 12). North 

 Carolina — Chapel Hill, April 7; Raleigh, April 6 (average of 9 years, 

 March 15). Virginia- — Shenandoah National Park, April 16. Dis- 

 trict of Columbia — May 11 (average of 27 years, April 6). Mary- 

 land^ — Montgomery County, May 8; Frederick County, May 6. 

 Pennsylvania — Renovo, May 16; State College, April 25 (average, 

 April 15). New Jersey — Troy Meadows, May 11. New York — 

 Madison County, May 10; Long Island, May 9. Connecticut — 

 Portland, April 26; Concord, May 4. Massachusetts — Martha's 



