
No. 429.] RELATION OF WIND TO BIRD MIGRATION. 749 


TABLE V. 
SPECIES. DATE. ABUNDANCE, 
esu s OTA Me SOR Í HI dde 
Fishhawk Sept. 1-Oct. 15 | Abundant. 
(Pandion halietus caroli- 
nensis 
Marsh hawk Sept. I-Oct. ro. | Very common. 
(Circus hudsonius) 
Pigeon hawk Sept. 10-Oct. ro | Regular, but not common. 
(Falco columbarius) 
Sparrow hawk Sept. 1o-Oct. ro | Very common. 
(Falco sparverius) 
Sharp-shinned hawk Sept. 5-Oct. 15 | Very abundant. 
(Accipiter velox) 
_Cooper’s hawk Sept. 5-Oct.15 | Very common. 
(Accipiter cooperi) 
oshawk Oct. 25-Nov. 25 | Occasional, sometimes com- 
(Accipiter atricapillus) mon in November. 
Broad-winged hawk Sept. ro-Oct. 1 | Very abundant. 
(Buteo latissimus) 
Red-shouldered hawk Oct., Nov. (?) Common. 
(Buteo lineatus) 
Red-tailed hawk Oct. 20-Dec. 1 Very common. 
(Buteo borealis) 

September 18, 1900. The map shows the extent of coun- 
try throughout which north or northwest winds prevailed at 
8 a.m. on that date. These winds were reported through- 
out an area of over 800,000 square miles, and their recorded 
velocity varied from ten to forty miles per hour. 
Owing to these winds a large southward flight of birds must 
have occurred on the given date in eastern Canada and in the 
eastern part of the United States. 
This map is employed to show also the general migration 
directions of various water birds in the eastern part of the 
United States. The arrows 4A show the probable line of 
flight of many ducks, swans, and shore birds from the interior 
of Canada to the North Carolina coast. Those marked C show 
the sea flight of many water birds from Labrador, as noted 
in the Gulf of St. Lawrence region by the author, and those 
marked B indicate the direction of the coast line migration. 
