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THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 124. No. 2. June 2012 
Black-and-white Warbler 
£ 70 
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Southern Oscillation Index 
Common Yellowthroat 
.£ 7S 
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Mean temperature (-CJ 
Mourning Warbler 
North Atlantic Oscillation Index 
Eastern Towhee 
Mean temperature («C) 
American Goldfinch 
Baltimore Oriole 
Mean temperature in the previous year («C) 
American Redstart 
for the species. Females are represented hv dntl ,ulialcs eac h species studied versus the most important climate variable 
trend line. Only the mean tempemtu^ V* « represented by crosses and the solid 
on the x-axis refers to current year mean tcmnemhf* W C " corre,atlon was to a temperature variable. Mean Temperature 
Redstarts were the only group lor which ,rriv.l • cxce P‘. 1,1 the case of the American Goldfinch. Male American 
earlier in warmer years. * • a cs were significantly related to any climate variable with birds arriving 
