Loxia l eucoptera . 
Concord, 
1899. 
Nov. 1-11 
Also 21, 
23 & 26. 
Mass . 
I have never before known these Crossbills to be anything 
. like so numerous in any part of Massachusetts as they were at 
Concord, Mass, during the present month. They appeared there 
on the 6th when I saw two flocks, one containing two, the 
other about thirty birds. After this I saw or heard them 
every morning when the weather was favorable and often at 
short intervals during the entire day although they seemed to 
be most active and noisy - and hence most conspicuous - at a- 
bout sunrise or shortly afterwards when flocks containing from 
fifteen to thirty birds each were almost continually passing 
or repassing over Ball's Hill. Whether I saw on such occa- 
different 
sions a dozen or fifteen flocks or the same flock a dozen or 
A 
fifteen times it was impossible to tell but although I usually 
kept within safe bounds by noting only one or two flocks in 
my field list at the end of each day I have little doubt that 
the wooded region lying between Ball's Hill and the Barret^ 
farm was visited daily between Nov. 6th and 23rd by at least 
six or eight different flocks of White-winged Crossbills con- 
taining in the aggregate over one hundred birds. 
On several occasions at Ball's Hill and once in the Bar- 
rett 'woods I saw a flock alight for a moment, always in the 
tops of pitch pines. These trees had few cones this year but 
the white pines were loaded with green cones which, however, 
did not appear to attract the Crossbills. What these birds 
