“Snowbird” is the name of a northern tourist who visits Florida to escape the winter.
 
   
(Oxford English Dictionary)
1923 Nation 31 Oct. 487 In winter, when building is at a standstill in the North, northern workmen, ‘snow birds’ or ‘white doves’ in Negro parlance, flock south. 1924 ‘DIGIT’ Confessions 20th Century Hobo 12 Snowbird, in the Southern States a Northerner who migrates south to avoid the winter. 1962 Economist 22 Dec. 1206/1 The Negro, who regularly loses his job to the ‘snowbirds’ from New York in the winter holiday season. 1979 United States 1980/81 (Penguin Travel Guides) 243 This figure swells..during the winter months when ‘snowbirds’ arrive. (‘Snowbird’ is a tricky term as used in Miami, it refers primarily to tourists escaping the Northeastern freeze.) 
 
 
16 November 1913, Los Angeles Times, pg. II2:
Even now the advance rush of the snow-birds is upon. The past week thirty-one from Winnipeg came in one party, also fifty-two from Sioux City, S. D.
 
 
21 December 1931, Key West Citizen, pg. :
Two of the first “snowbirds” of the hitch-hiker type to reach Key West for the approaching winter were given an “official” reception and entered a plea of guilty to the charge of breaking and entering when arraigned before County Judge Hugh Gunn this morning. 
 
 
20 July 1932, Gettysburg (PA) Times, pg. 2:
The Florida Snow Birds Tourists’ association held a picnic at Caledonia park Tuesday afternoon with the following persons present:... 
 
 
10 December 1939, New York Times, “‘Seven Floridas’ Welcome the Tourist,” pg. 179:
They are regarded primarily as snowbirds hurrying to luminous Miami.