Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
W.C. Russell
M.V.Z., Berkeley, Calif.
Nov 21 1957
Since there has been several inches of early rains it occured to me that possibly the moles might start breeding earlier than in was the case last year when it was very dry till after Christmas. Went to the area around Tomales, Marin Co and put out 4 spear traps and 7 live traps. This live trap is a new untied version of type used last year. There wasn't as much activity in mole workings as I had expected.
Nov 22 1957
Caught only 3 moles and they are not pregnant yet. The tube of 2 of the 4's were minute while one showed a bit of enlargement. However slides were made of this individual and it proved to be not pregnant. This still dormant state of sexual activity is reflected in the fact that surface mounds were not too plentiful. Also the 3 F's were taken at sites of small mounds. So it appears that early rains have not stimulated the moles to breed as I thought might be the case.