Berane Cee ba) Newb lel. hl tN 
TABLE 1 
ARRIVAL DATES 
Warblers Earliest Maximum Last 
Black and White 4-24-44 May 4tol2 5-30-40 
Prothonotary 5- 2-45 - 5-31-37 
Golden-winged 5- 9-36 H 5-16-43 
Brewster’s 5-19-45 “ 5-19-45 
Lawrence’s 5- 9-36 - 5- 9-386 
Tennessee 5- 6-438 May 12 to 20 5-23-37 
Orange-crowned 5- 2-48 May 138 to 17 5-21-37 
Nashville 4-30-42 May 8tol5 5-27-45 
Northern Parula 5- 9-37 & 42 May 14 to 16 5-24-37 
Yellow 5- 4-37, 40, 43 May 9tol16- 5-24-48 
Magnolia 4-29-38 May 10 to 20 6- 3-45 
Cape May 5- 7-48 May 15 to17 5-27-45 
Black-throated Blue 5-12-43 May 14 to18 5-27-45 
Myrtle 4- 5-45 May 5tol2 5-23-45 
Black-throated Green 5- 1-42 May 12 to 16 5-24-36 
Blackburnian 5- 6-39 May 14 to18 5-27-45 
Chestnut-sided 5- 8-36 May 14 to 17 5-27-45 
Bay-breasted eur eeye) May 13 to 16 5-26-45 
Black-poll 5- 7-39 May 15 to 19 5-23-37 & 42 
Northern Pine 5-14-44 * 5-20-38 - 
Prairie 5- 9-44 + 5- 9-44 
Western Palm 4-28-38 & 39 May 7to12 5-27-45 
Oven-bird 5- 2-36 May 12 to 21 6- 8-45 
Grinnell’s Water-Thrush 4-28-38 & 40 May 8tol4 5-26-43 
Louisiana Water-Thrush 5- 6-39 > 5-27-45 
Kentucky 5- 7-42 FE 5-27-45 
Connecticut 5- 7-41 May 21 to 25 5-29-45 
Mourning 5-19-40 May 21 to 25 6- 5-45 
Northern Yellow-throat 4-30-42 May 11 to 16 5-30-36 & 37 
Yellow-breasted Chat 5- 9-44 * 5-17-44 
Wilson’s 5-12-39 & 45 May 15 to 23 6- 6-45 
Canada 5- 9-43 May 17 to 25 6- 3-45 
American Redstart 4-21-42 May 12 to 21 6- T-45 
*Total too small to establish maximum period. 
suppose that with the exception of summer residents, birds remain only 
one day in the immediate territory where they are recorded and that two 
or more days would be the exception. This theory is further borne out by 
the results of banding done by Mr. Karl Bartel at Blue Island, Illinois. 
Mr. Bartel informs me that out of some 400 warblers banded, he has had 
but one repeat; that bird repeated the day following its banding. 
In the treatment of the dates and numbers given in the two tables, I 
have arbitrarily treated all species as migrants. This, of course, is not 
always the case but I believe it is perfectly justified in this study as 
comparatively few of the total are resident birds. Any material inaccuracy 
of such a plan would be reflected only in the “late” date observed. Further- 
more, I have made allowance for this situation by including no record 
