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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
california condor Eben Mcmillan 24 October 1963
seen condor since I was here last. Gib McKinsey thought
I might see condor if I watched near the mouth of Tunis
canyon. Two of the Cowboys with whom I chatted, before the
others arrived, thought there should be condors around during
the last month if they liked dead calves, for they said great
numbers of Calves had been aborted by Tejon Ranch Cows,
and heifers, during the last month. This is the first direct
evidence I have gained that abortion was prevalent in the Tejon
herd this fall, for there seems to be a reluctance on the part
of all people, associated with this problem, to admit of its
seriousness. These two Cowboys said they saw no reason to hide
the fact that abortion was taking a toll of ranch Calves before
birth, and that they thought it should be discussed, and made public
information, in that there is nothing to be gained by keeping it secret.
Today the Cowboys had been working the purebred herd of Cows that
is kept as a means of furnishing their own breeding range
bulls. This purebred herd is kept out on the flats to the North and
east of Grapevine, where numerous small fields make it possible
to keep records of the breeding history of each sire, and each
cow. There seems to be evidence supporting a claim that these
purebred animals have developed genetic traits that do not
particularly help them to survive under adverse conditions. This,
in conjunction with a steadily depleting range, will probably always
assure condor food, providing the same practices are continued. The
Tejon ranch is now commencing to use Mexican and Southern
States cattle in order to fad off the back Country, to which the
better bred natives, will not range out and utilize.