The above range is for the species as a whole, of which two geographic races are recognized: the southern parula warbler (P. a. americana) breeds in southeastern United States from Maryland southward, east of the mountains; the northern parula warbler (P. a. pusilla) breeds in the western and northern portion of the range.
Migration.—Late dates of spring departure from the winter home are: El Salvador—Barra de Santiago, April 18. Guatemala—San José, March 7. Yucatán—San Felipe, April 4. Virgin Islands—St. Croix, April 30. Puerto Rico—Mayagüez, May 7. Haiti—Port au Prince, April 4. Cuba—Habana, May 4. Bahamas—Cay Lobos, May 14.
Early dates of spring arrival are: Florida—Daytona Beach, March 3. Alabama—Coosada, March 25. Georgia—Savannah, March 8. South Carolina—Frogmore, March 5. North Carolina—Washington, March 26. West Virginia—Bluefield, April 9. District of Columbia—Washington, April 6. Pennsylvania—Carlisle, April 25. New York—Shelter Island, April 23. Massachusetts—Stoughton, April 25. Vermont—St. Johnsbury, April 21. Maine—Portland, April 29. Nova Scotia—Wolfville, May 8. New Brunswick—St. Stephen, May 9. Quebec—Quebec, May 10. Louisiana—New Orleans, February 15. Mississippi—Bay St. Louis, March 5. Arkansas—Helena, March 24. Tennessee—Athens, April 3. Kentucky—Eubank, April 4. Indiana—Bloomington, April 21. Ohio—Columbus, April 28. Michigan—Ann Arbor, April 29. Ontario—Toronto, May 2. Missouri—Columbia, April 5. Iowa—Grinnell, April 28. Wisconsin—Madison, April 30. Minnesota—Red Wing, May 5. Texas—Hidalgo, March 5. Oklahoma—Caddo, March 25. Kansas—Independence, April 8. Nebraska—Havelock, April 20.
Late dates of fall departure are: Minnesota—St. Paul, October 5. Wisconsin—Milwaukee, October 9. Missouri—St. Louis, October 5. Ontario—Point Pelee, October 5. Michigan—Grand Rapids, October 19. Ohio—Toledo, October 19. Indiana—Richmond, October 14. Tennessee—Nashville, October 3. Arkansas—Monticello, October 2. Louisiana—Covington, October 26. Mississippi—Gulfport, November 2. Quebec—Hatley, September 30. New Brunswick—Scotch Lake, September 28. Maine—Portland, October 24. New Hampshire—Hanover, October 11. Massachusetts—Rockport, October 25. New York—Rhinebeck, October 21. Pennsylvania—Berwyn, October 26. District of Columbia, Washington, October 17. West Virginia—French Creek, October 1. Virginia—Lynchburg, October 17. North Carolina—Rocky Mount, October 23. South Carolina—Charleston, October 22. Georgia—Athens, November 4. Florida—Gainesville, November 19.
Early dates of fall arrival are: Bahamas—Watling Island, September 28. Cuba—Habana, August 10. Dominican Republic—San Juan, October 21. Puerto Rico—Parguera, September 19. Nicaragua—Río Escondido, October 20. Costa Rica—Villa Quesada, October 24.
Banding.—Only a single migration record is available from banded birds. A parula warbler banded as an adult at Flushing, Long Island, New York, on September 16, 1946, was found dead about October 1, 1947, at La Grange, Maine.
Casual records.—The parula warbler has been recorded three times in Colorado (in El Paso County, at Kit Carson, and at Denver); and three times in Wyoming (once at Cheyenne and twice at Torrington).
Egg dates.—Massachusetts: 52 records, May 20 to July 7; 29 records, May 29 to June 10, indicating the height of the season.
Connecticut: 39 records, May 25 to June 25; 25 records, June 1 to 10.
South Carolina: 20 records, April 10 to June 24; 10 records, April 30 to May 11.