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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
Mayhew
1958
Mallard
42.
June 6 Gray Lodge Refuge, Sutter Co., Calif.
Nest 23 (cont.) - Temp. - 30°C.; R.H. -
74% (dropped to 67% & stayed there
until temp. reading stabilized).
Nest 11 - The ♀ was flushed from 7 eggs.
The nest contains lots of down, & is about
3 feet from water. Temp. - 32°C.; R.H. - 74%.
Nest 32 - The ♀ was absent when I
arrived, but the eggs were warm. There
was lots of down in the nest, along with
8 eggs. The cover of bull thistles was
about 30" high. The nest was about 30 feet
from water. Temp. - 28°C.; R.H. - 70%.
Nest 26 - The ♀ was flushed from 4
eggs. There was lots of down in the nest.
The nearest water was about 100 yards
away. Temp. - 30°C.; R.H. - 70%.
Nest 31 - The ♀ flushed from 6 eggs. There
was a fair amount of down present in
the nest. The nearest water was about
50 yards away. The cover of bull thistle
& pigweed was about inches high. Temp.-
25°C.; R.H. - 75%.
Nest 17 - A ♀ flushed from 5 eggs. There
was lots of down present. The nearest
water was at least ¼ mile away (some
pools nearby had dried up). Temp. - 35°C.;
R.H. - 56%.
Nest 21 - A ♀ was flushed from 7 eggs.
There was no down in the nest. The
nearest water was about 200 yards away.