Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cliff Swallow
Mayhew
1950
April 29 Bridges, 10 miles west, 1 mile south of Turlock, Stanis. Co., Calif.
The bridge from which I cleared out all
the old nests of last year has the following
arrangement of new nests this year:
(Bridge #1)
N ->
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
The bridge about 200 yards south
of bridge #1 was left as it was found,
with all the remnants of old nests
still in place. This bridge (bridge #2)
looks as follows: