Mean Julian capture date 
562 
THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 123. No. 3. September 2011 
American Redstart 
260 
Black-and-white Warbler * 
Slope = 0.08 P= 0.10; /* = 0.06 
Slope = 0.26; P< 0.001; r» = 0.31 » 
250 
* , * 
A 
4* A t --- - 
* * * 
_-—' 
***** * •“* * 
240 
* * * —*-'C~V* ** * . 
*, ** * ‘ 4 * 
___-*"1"'*’" 
* * 4 * » ‘ * * 
* 4 * 
* A 
230 
220 
* 
I960 1970 
1990 2000 
1960 1970 1980 1990 
. Blue-winged Warbler 
Slope = 0.08; 0.20; r’ *» 0.04 
1990 2000 
Ovenbird 
Slope = 0.002; P= 0.97; r‘= 0.00 
1960 1970 1980 1990 
FIG. I. Relationship between mean Julian capture date and year for eight long-distance migrant species captured at 
Kingston Wildlife Research Station, Rhode Island, between 1960 and 2007. Trend lines are shown for species with 
significant linear trends in mean capture date over time. 
