Non-shore-bird Records 
In addition to the close count of shore birds an accurate list was kept of

all new arrivals. In the First Arrival Dates (IV) appear the 171 species
of birds 
seen by us for the first time between March 23 and May 25. Not all winter
and year- 
round residents were seen by us in the first week, and our first records
of these 
+. included. Thus, the hairy woodpecker, though first seen by us on April
6, is be- 
lieved to have been in the Arboretum all winter and doubtless to have been
seen by 
others before us. Many were seen by uqfter being reported by others; but
obvious- 
ly this was our work, and these are our records. Out total of 171 we consider
rath- 
er a good number of i rds* 
Some of our records we consider unusually good, including both interesting

migrants and particularly good early or late dates. The evening grosbeak
(May 10) 
was perhaps the most interesting as dates go, being quite late. The myrtle
warbler 
(April 6) on the other hand, was quite early. (See III, Outstanding Records).

Perhaps two unusual records deserve special comment. One is that of the night-

haW (March 25). This was very early but we have every reason to believe in
the ac- 
curacy of the identification; striking white wing-bars visible in flight
certainly 
clinch the point. Another bird whose early appearance was a great surprise
was the 
little blue heron (May 5). Judging from the field markings, there remains
little 
room to suspect that this was in realit4 the little green, several times
seen dur- 
ing the progress of our work. 
Some reading was done on papers dealing with censusing methods; but since

little was found applicable in our work, no citations will be given.