1907
May 8
(No 2)
words he turned first one side up & then the other.
This I think happened every time he swooped but I
could not make sure that such was the case. What 
I did see beyond the possibility of mistake was that
he tilted thus two or three times during each of
the two flights when I had him in view. If I
am not greatly mistaken no one has ever noticed
this tilting before or at least reported doing so.
I, certainly, saw it to-night for the first time.
It was very marked and interesting. I think the
bird happened to be at just the right angle with
my line of vision. During his first flight he made
rather short and regular swoops; during the second
his movements were so swift and erratic erratic that my
eyes were taxed to follow him. His song was
hardly up to the standard for his voice lacked
strength and fullness although it was as sweet as usual.