Image from the Biodiversity Heritage Library.
Contributed by Harvard University, Museum of Comparative Zoology, Ernst Mayr Library.
| www.biodiversitylibrary.org
Transcription
Lo. = near Lo abai'de
U = Upton.
Chelidon erythrogaster
1907
July 19 20 B cloud .
" 2,3 30 a.m. 24 20 25-10 26 15- 27 3 30 40 } Lo. Umbagog
August 1 30 2 40 3 15- 3 50+ 7 50+ 9 30 16 2 12 20 18-20 }
1908 Hirundo hurvarum, Lake Umbagog.
August 17 copy 4
I have long been in
doubt as to the precise character
or meaning of the prolonged notes
of Swallow and other notes which
the Barn Swallow indulges in so
freely and which are so very pleasing
to human ear. Many writers seem
to regard them as representing the
birds song, in support of this
are the facts that they seem to
be uttered only by the male and
oftenest in the breeding season.
But I have them now almost as
frequently out in May or June and
I am by no means sure that they
are used only by the male, but if
they are of this definite character,
the same Swallow for it is clear
everything all my various calls
but the call-in - two- calla ones
are not heard more frequently
nor to return or each one in the
season as they I believe do
represent a song.