MICHIGAN ACADEMY OF SCIENCE. 
TABLE OF SPECIES OCCURRING ON MORE THAN 
155 
ONE WAVE. 
( 
Frequency 
Month. 
Week. 
Names of species. 
No. of 
of first 
waves. 
arrivals. 
2 
8 
Bronzed Grackle. 
2 
6 
Meadow Lark. 
2 
7 
Fourth. 
Phoebe. 
0 
7 
3 
3 
Cowbird. 
3 
5 
Tree Swallow. 
3 
3 
Vesper Sparrow. 
2 
2 
3 
3 
Third. 
2 
3 
Ruddy Duck. 
2 
2 
Brown Thrasher. 
2 
7 
W hip-poor-will. 
2 
2 
Tree Swallow. 
2 
2 
0 
7 
Baltimore Oriole. 
3 
12 
Blue-gray Gnatoatcher. 
2 
11 
White-throated Sparrow. 
2 
6 
Yellow Warbler. 
3 
10 
Red-headed Woodpecker. 
2 
7 
Least Flycatcher. 
0 
6 
2 
4 
Whip-poor-will. 
2 
6 
Bobolink. 
7 
9 
1 
Myrtle Warbler. 
3 
4 
Palm Warbler. 
9 
10 
Least Flycatcher. 
4 
4 
Chestnut-sided Warbler. 
6 
6 
Black-throated Blue Warbler. 
3 
12 
Golden-winged Warbler. 
4- 
6 
Orchard Oriole.. 
5 
6 
5 
Wilson’s Warbler. 
5 
3 
Third. 
Wilson’s Warbler... 
2 
3 
SUMMARY OF BIRD WAVES. 
The period of greatest migration occurs the last week 
of April and the 
first week of May. While there are many “first arrivals” for March, 
there, are distinct “bird waves” for three years on the 
first week, with 
a total of eighteen species. The second, third and fourth weeks each 
have only one year with a “bird wave” with a total of 
eighteen species. 
The first week of April has “bird waves” for five different years with a 
total of thirty species, while the second and third weeks have only 
four waves with totals of twenty-five and twenty-eight species respec- 
tively. The 
fourth week of April has eight waves for 
eight years with 
a total of fifty-three species. May, the last month of the migration, 
gives, during the first week, the greatest number of waves 
(twelve 
years), ranging in number from seven species on the 
seventh 
of May 
(1903) to twenty species 
on the fifth of May (1896), 
and twenty-one 
