Migration.—Late dates of spring departure from the winter home are: Perú—Chelpes, April 22. Ecuador—Quito, May 10. Venezuela—Rancho Grande, April 22. Colombia—La Porquera, April 24. Costa Rica—Vera Blanca, May 7.
Early dates of spring arrival are: Panamá—Garachiné, March 5. Florida—Pensacola, April 5. Alabama—Hollins, April 4. Georgia—Athens, March 29. South Carolina—Aiken, April 17. North Carolina—Weaverville, April 16. Virginia—Lynchburg, April 25. West Virginia—White Sulphur Springs, April 17. District of Columbia—Washington, April 23. Pennsylvania—Renovo, April 27. New York—Rochester, April 26. Massachusetts—Melrose, April 29. Vermont—Wells River, April 30. Maine—Portland, May 4. New Brunswick—Scotch Lake, May 5. Quebec—Montreal, May 10. Louisiana—Lake Borgne, March 27. Mississippi—Gulfport, March 27. Tennessee—Chattanooga, March 31. Kentucky—Lexington, April 12. Indiana—Brookville, April 15. Ohio—Oberlin, April 19. Michigan—Hillsdale, April 22. Ontario—London, April 27. Arkansas—Huttig, April 15. Missouri—Bolivar, April 20. Iowa—Davenport, April 28. Wisconsin—Unity, April 27. Minnesota—Waseca, April 30. Texas—Boerne, March 31. Nebraska—Stapleton, May 1. South Dakota—Vermilion, May 3. Manitoba—Aweme, May 14.
Late dates of spring departure of transients are: Florida—Pensacola, May 9. Alabama—Autaugaville, May 12. Georgia—Athens, May 7. South Carolina—Spartanburg, May 12. North Carolina—Greensboro, May 17. Virginia—Charlottesville, May 28. District of Columbia—Washington, June 3. Pennsylvania—Norristown, May 30. New York—New York, June 7. Louisiana—New Orleans, April 23. Mississippi—Corinth, May 12. Kentucky—Lexington, May 16. Illinois—Lake Forest, June 9. Ohio—Toledo, June 12. Arkansas—Rogers, May 12. Missouri—Kansas City, May 30. Iowa—Sigourney, June 1. Texas—Commerce, May 18. Nebraska—Fairbury, May 26. South Dakota—Yankton, June 2.
Late dates of fall departure are: Saskatchewan—Last Mountain Lake, September 1. Nebraska—Fairbury, October 14. Texas—Brownsville, October 2. Minnesota—Saint Paul, September 25. Wisconsin—Madison, September 27. Ontario—Hamilton, October 3. Michigan—Ann Arbor, October 8. Indiana—Waterloo, October 17. Kentucky—Danville, October 16. Missouri—St. Louis, October 6. Tennessee—Memphis, October 28. Arkansas—Chicat, October 4. Mississippi—Eudora, October 24. Louisiana—New Orleans, October 9. Quebec—Hatley, September 30. New Brunswick—Scotch Lake, September 28. Maine—Phillips, September 17. New Hampshire—Hanover, September 24. Massachusetts—Wellesley, October 23. New York—Canandaigua, October 12. Pennsylvania—Berwyn, October 19. District of Columbia—Washington, October 10. West Virginia—Bluefield, October 8. Virginia—Sweet Briar, November 1. Georgia—Tifton, November 2. Alabama—Birmingham, October 25. Florida—Arcadia, October 30. Cuba—Bosque de la Habana, October 30.
Early dates of fall arrival are: North Dakota—Argusville, August 23. Texas—Commerce, August 28. Illinois—Glen Ellyn, August 19. Ohio—Little Cedar Point, July 31. Kentucky—Versailles, August 31. Tennessee—Nashville, August 29. Mississippi—Bay St. Louis, August 11. New York—New York, August 11. Pennsylvania—Berwyn, August 19. District of Columbia—Washington, August 2. Virginia—Charlottesville, August 10. North Carolina—Mount Mitchell, July 30. Georgia—Savannah, August 10. Florida—Key West, July 29. Cuba—Santiago de las Vegas, September 20. Costa Rica—San José, August 17. Colombia—Santa Isabel, September 22. Venezuela—Escorial, October 14. Ecuador—Tumbaco, October 12. Perú—Tambillo, November 19.
Casual records.—A specimen of Blackburnian warbler was collected at Frederickshaab, Greenland, on October 16, 1845. One was taken at Ogden, Utah, in September 1871, and another near Fort Bayard, N.M., in May 1876. On August 21, 1924, a male was watched closely for sometime near Libby, Mont.
Egg dates.—Maine: 5 records, June 2 to 17.
New York: 23 records, May 29 to July 6; 16 records, June 7 to 17, indicating the height of the season.
New Hampshire: 6 records, May 23 to June 18.
Pennsylvania: 5 records, May 28 to June 9.