1.
Concord, Mass.
Spring to early Summer
1913.
March 15 
to 
July 3

General field notes
Scarcity of early birds
Light migration

  During this period I was at Concord practically the entire time 
save between March 22 and 31st, on May 5, 6, 26 and 27, and from 
June 2 to 7. Early in the season there were comparatively few birds
except Blackbirds and Meadow-larks which were present in unusual 
numbers. Robins and Song Sparrows were especially scarce at first 
but doubled or even quadrupled in numbers about the beginning of 
their breeding season. The earlier flights of north-bound migrants 
such as Tree Sparrows, Juncos and Song Sparrows were exceptionally light
and almost no Fox Sparrows were seen until April when they were 
by no means abundant. The north-bound warblers dribbled through, a 
few at a time, in late April and the fore part of May the only 
"rush " of any magnitude occurring on the 25th of the latter month 
when Canadian warblers and Blackburnians passed in considerable 
numbers. Despite the exceptional earliness of the season as 
regarded the vegetation few of the birds arrived before their
usual dates and many were much behind them. After all