California Condor Eben McMillan 13 February 1964 Wind was picking up soil from the freshly cultivated fields along highway 33 and carrying same towards the mountains as clouds of dust. Dark clouds over Frazier and Pinos mountain masses, appeared to be releasing some moisture, probably in the form of snow flurries. I remained along the south boundary of this field the remainder of this day watching for Condor that might be attracted to this area by the placental remains following birth of calves by several of the many [illegible] that have been left in this field to calve out so that better watch could be kept over them to minimize the deaths that had been occurring among these [illegible] of late before they were moved out of the mountains into this field. Several of the [illegible] themselves had died in the process of giving birth to calves since being moved to this field and several calves had died while the [illegible] had survived in the process. An intense sonic boom reverberated throughout the area at 11:00 A.M. from a high flying plane that left short contrails at a high altitude. A band of about thirty horses that had been feeding near where I was parked all dashed away excitedly following this sonic boom. As far as I could see, no cattle reacted to this explosive sound. I watched a pigeon hawk sit on a post about one hundred feet from where I parked in the car. This hawk paid no attention to my movements, even when I got out of the car to adjust my telescope. This bird continued to watch the sky above it frequently as if expecting enemy action from above.