MIGRATION OF OUR BIRDS I7I 
In six years, the migration of the Vesper Sparrow has occured 
within a period as short as two weeks—from March 26 to April 
g. Only one record is found in March, and one in the second week 
of April. All the others—including the one for 1914—fall within 
the first week of April. | 
Like the Vesper Sparrow, the Flicker, in six years, had but 
one March record; but unlike that species, this woodpecker 
arrived for three springs in the first week, and for two springs, 
in the second week, of April. The whole period of migration 
for six years was 19 days—from March 24 to April 12. 
The Towhee was regular in its arrival this year, reaching us 
on April 7. Four of the records of this species occur within less _ 
than a week—from the 2nd to 8th of April. The latest date of 
migration for the Towhee was April 17, 1909, and the earliest, 
March 19, 1910. 
The Field Sparrow, in four springs, came north within 6 
days—from March 31 to April 7. Although usually regular in 
its time of arrival, this sparrow has two March datés—the 21st 
and the 25th; the entire period of migration for six years being 
17 days. 
The Fox Sparrow migrates with regularity—its dates for 
the last three years all falling within the first week of April. The 
writer has no records of this species for the years, 1909 to IgII. 
Another species with even fewer records than the Fox Sparrow, 
is the Loggerhead Shrike.. The two records I have are—April 
8, 1913, and April 7, 1914. To the future, then, it must be left 
to determine whether this species is regular in its spring migration. 
_ A period of 15 days, in April, is the time of the Spring migra- 
tion of the Hermit Thrush. The date for the present year is the 
9th, which is one of the earliest. Three other records were later, 
the latest of all being in 1913—the roth. 
The Chipping Sparrow is both a March and an April migrant— 
there being four records in April and two in March. In the latter 
month the dates were the 29th and the 30th. In April, the records 
fall within ten days—two occurring on the 15th, which is also 
the latest date for this sparrow. 
In the Brown Thrasher, we have a species whose records are 
remarkably regular. I shall give them all for six springs, begin- 
ning with 1909—April 17, 10, 16, 15, 12, 16. The trained observer 
is quite certain of his dates for this species, which sings either 
