Winter range.—The magnolia warbler is found in winter north to northern Puebla (Metlatoyuca); Veracruz (Tlacotalpan); and Quintana Roo (Puerto Morelos and Cozumel Island). East to Cozumel Island; British Honduras (Orange Walk and Belize); Honduras (Tela and Ceiba); Nicaragua (Río Escondido); and Panamá (Canal Zone). South to Panamá (Canal Zone and Almirante). West to western Panamá (Almirante); Costa Rica (Guayabo); El Salvador (Puerto del Triunfo); Guatemala (San Lucas); Oaxaca (Tehuantepec); western Veracruz (Motzorongo); and northern Puebla (Metlatoyuca). Occasional or accidental in winter (possibly from delayed migration), in southern Sonora (Alamos); Texas (Brownsville, Dallas, and Huntsville); Mississippi (Edwards and Gulfport); Alabama (Tupelo); and Florida (New Smyrna). It has also occurred rarely in migration in the West Indies; Cuba (Habana); Dominican Republic (Puerto Plata); and Puerto Rico (Mayagüez).
Migration.—Late dates of spring departure from the winter home are: Nicaragua—Edén, March 29. El Salvador—Chilata, April 24. Guatemala—Chuntuqui, April 25. Honduras—Tela, April 24. Veracruz—Minatitlán, April 27. Puerto Rico—San Germán, April 20. Cuba—Santiago de las Vegas, May 4.
Early dates of spring arrival are: Florida—Palm Beach, March 3. Alabama—Long Island, April 10. Georgia—Savannah, April 13. South Carolina—Summerton, April 17. North Carolina—Waynesville, April 14. Virginia—Lynchburg, April 18. West Virginia—White Sulphur Springs, April 25. District of Columbia—Washington, April 22. Pennsylvania—Pittsburgh, April 22. New York—Canandaigua, April 23. Massachusetts—Amherst, April 29. Vermont—St. Johnsbury, April 29. Maine—Dover-Foxcroft, May 5. New Brunswick—Scotch Lake, May 2. Nova Scotia—Wolfville, May 6. Quebec—Quebec, May 4. Prince Edward Island—Mount Herbert, May 4. Louisiana—Avery Island, April 6. Mississippi—Edwards, April 17. Arkansas—Helena, April 20. Tennessee—Knoxville, April 17. Kentucky—Bowling Green, April 23. Illinois—Le Roy, April 19. Ohio—Oberlin, April 19. Michigan—Grand Rapids, April 26. Ontario—London, April 30. Missouri—Marionville, April 20. Iowa—Iowa City, April 27. Wisconsin—Milwaukee, April 26. Minnesota—Crystal Bay, April 29. Texas—Brownsville, April 3. Nebraska—Lincoln, April 29. South Dakota—Yankton, May 2. North Dakota—Argusville, May 11. Manitoba—Aweme, May 11. Saskatchewan—Wiseton, May 5. Colorado—Derby, May 3. Alberta—Glenevis, May 22. Mackenzie—Simpson, May 23.
Late dates of spring departure of transients are: Florida—Dry Tortugas Island, May 22. Alabama—Leighton, May 10. Georgia—Margret, May 25. South Carolina—Spartanburg, May 18. North Carolina—Raleigh, May 18. Virginia—Naruna, May 25. District of Columbia—Washington, June 4. Louisiana—Cameron Farm, May 15. Mississippi—Deer Island, May 21. Arkansas—Winslow, May 22. Tennessee—Nashville, May 22. Kentucky—Danville, May 27. Illinois—Chicago, June 8. Ohio—Youngstown, June 3. Missouri—St. Louis, June 3. Iowa—Mount Vernon, June 2. Texas—Waco, May 23. Oklahoma—Arnett, May 28. Kansas—Stockton, May 21. Nebraska—Stapleton, May 23. South Dakota—Yankton, June 6. North Dakota—Argusville, June 12.
Late dates of fall departure are: Alberta—Glenevis, September 18. Saskatchewan—Wiseton, September 27. Manitoba—Shoal Lake, September 28. North Dakota—Fargo, October 9 (bird banded). South Dakota—Lennox, October 5. Texas—Cove, November 13. Minnesota—St. Paul, October 2. Wisconsin—Appleton, October 18. Iowa—Sigourney, October 20. Ontario—Toronto, October 16. Ohio—Cleveland, November 2. Indiana—Elkhart, October 16. Kentucky—Bowling Green, November 10. Tennessee—Nashville, November 11. Mississippi—Gulfport, November 8. Louisiana—New Orleans, November 4. Newfoundland—Tompkins, September 25. Prince Edward Island—North River, September 8. Quebec—Quebec, September 19. New Brunswick—Saint John, October 12. Maine—Portland, September 28. New Hampshire—Hanover, October 16. Massachusetts—Lynn, October 28. New York—Long Beach, October 27. Pennsylvania—Jeffersonville, October 15. District of Columbia—Washington, October 28. Virginia—Lawrenceville, October 25. North Carolina—Raleigh, October 20. South Carolina—Cherokee Plantation, November 12. Georgia—Atlanta, November 4. Florida—Pensacola, October 31.
Early dates of fall arrival: North Dakota—Fargo, September 3. South Dakota—Aberdeen, August 26. Nebraska—Monroe Canyon, Sioux County, September 12. Texas—Brownsville, September 3. Wisconsin—New London, August 12. Iowa—Grinnell, August 20. Illinois—Chicago, August 12. Indiana—Indianapolis, August 25. Kentucky—Wurtland, August 8. Tennessee—Nashville, August 27. Mississippi—Edwards, September 7. Louisiana—September 11. District of Columbia—Washington, August 15. Virginia—Charlottesville, September 3. North Carolina—Asheville, August 28. Georgia—Athens, September 7. Alabama—Birmingham, September 13. Florida—St. Augustine, September 3. Cuba—Habana, November 3. Yucatán—Chichén-Itzá, October 7. Honduras—Truxillo, September 27. Guatemala—Colomba, September 30. El Salvador—Divisadero, October 12. Nicaragua—Río Escondido, October 27. Panamá—Cocoplum, October 24.
Casual records.—A specimen was secured in Bermuda on May 7, 1878; a specimen was collected at Godthaab, Greenland, in 1875; a bird was picked up, recently dead, at Salem, Oreg., in January 1907; and on October 1, 1913, a specimen was picked up dead on the sea ice a mile off shore from Humphrey Point, Alaska. Eight specimens have been taken in California: Farallon Islands, May 29 and June 2, 1911; at sea about 10 miles west of Halfmoon Bay, June 8, 1943; Yosemite Valley, October 6, 1919; Santa Cruz Island, May 23, 1908; Santa Barbara Island, May 15, 1897; and Los Angeles, October 21, 1897, and October 5, 1901.
Egg dates.—Maine: 95 records, June 4 to 30; 74 records, June 7 to 15, indicating the height of the season.