Migration.—Late dates of spring departure are: Colombia—Santa Marta Region, March 21. Veracruz—Jalapa, April 7. Florida—Pensacola, April 25. Alabama—Guntersville, May 2. District of Columbia—Washington, May 30. Louisiana—Monroe, April 27. Texas—San Antonio, May 12.
Early dates of spring arrival are: Florida—Pensacola, April 4. Alabama—Shelby, April 4. Georgia—Atlanta, March 26. North Carolina—Arden, April 18. District of Columbia—Washington, April 23. West Virginia—Wheeling, April 23. Pennsylvania—Germantown, April 25. New York—Yonkers, April 26. Massachusetts—Lexington, May 6. Mississippi—Bay St. Louis, March 13. Louisiana—New Orleans, March 23. Arkansas—Winslow, April 2. Tennessee—Nashville, April 7. Kentucky—Eubank, April 10. Illinois—Springfield, April 29. Ohio—Columbus, April 22. Michigan—Ann Arbor, May 1. Missouri—St. Louis, April 17. Iowa—Grinnell, April 28. Wisconsin—Reedsburg, April 30. Minnesota—Lanesboro, May 7. Texas—Cove, March 27. Kansas—Onaga, April 26.
Late dates of fall departure are: Minnesota—Lanesboro, September 1. Wisconsin—Elkhorn, September 19. Iowa—Giard, September 20. Missouri—Monteer, September 17. Arkansas—Winslow, September 18. Louisiana—Monroe, October 7. Michigan—Jackson, September 13. Ohio—Oberlin, September 27. Indiana—-Bloomington, September 28. Illinois—Chicago, September 29. Kentucky—Bowling Green, October 5. Tennessee—Memphis, September 11. Mississippi—Deer Island, October 13. Massachusetts—Belmont, September 6. New York—New York City, September 25. Pennsylvania—-Jeffersonville, September 19. District of Columbia, Washington, September 14. West Virginia—French Creek, September 28. North Carolina—Reidsville, September 26. South Carolina—Huger, September 10. Georgia—Tifton, September 27. Florida—St. Marks, October 9.
Early dates of fall arrival are: District of Columbia—Washington, August 13. Georgia—Columbus, July 28. Alabama—Leighton, August 8. Florida—Key West, August 30. Mississippi—Gulfport, August 23. Texas—Cove, July 29. Tamaulipas—Matamoros, August 25. Costa Rica—Bonilla, September 8.
Banding.—Few blue-winged warblers have been banded and recovered. A bird banded at Elmhurst, Long Island, on August 17, 1935, flew into a screened porch at Westbury, Long Island, on May 7, 1937. The two places are about 15 miles apart.
Egg dates.—Connecticut: 30 records, May 25 to June 24; 20 records, May 29 to June 6, indicating the height of the season.
New Jersey: 40 records, May 16 to June 19; 29 records, May 22 to 30.
Pennsylvania: 27 records, May 28 to July 7; 14 records, May 28 to June 3 (Harris).