California condor survey field notes, v1477
Page 483
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Transcription
California Condor Eben McMillan 22 may 1964 This would form a concentration whereby it would not be difficult for a Condor or a turkey vulture to pick up ten or twelve poisoned rats in the matter of one hour. Assuming then, that each Poisoned Rat had a minimum of ten grains of poison grain in its pouches and that a Condor picked up and swallowed whole ten Rats in one hour, it would therefore have in its insides, exclusive of what poison the dead rats had in their systems, one-hundred grains of 1080 Poisoned grains that would be sufficient to kill a minimum of twenty ground squirrels, and surely any condor. I drove over the property of Trent Stockton that had been poisoned yesterday with 1080 poisoned Potted barley. No death animals were found. In fact, there were few places where excessive amounts of squirrels seemed to be. On some of the Squirrel dens, poison was still evident, and in only a few places did I see evidence where squirrels, or other small mammals, had eaten the poisoned gains. I saw numerous places, where poison had been scattered, by the handful, where no sign of squirrels was evident. Enough poisoned grain had been scattered on this ranch whereby kangaroo Rats could have found enough to have killed good numbers of their kind, had there been good numbers of them on this property. I saw very few signs of a large population of kangaroo Rats inhabiting any area on the Trent Stockton Ranch near Mt. Poso oil fields. Perhaps one should do some thinking about when the rats were poisoned here when plentiful and see if condor deaths could be correlated to that time.