Gymnogyps californianus April 13, 1946 Hopper Canyon Cal. ass a few days ago was probably caused by preceding bad weather which prevented feeding & drought or hunger. We left blind about 10 a.m. About 10:10 I saw 4 condors soaring N. about 1/2 mile E. of horse carcass - 3 headed on toward the Agua Blanca, the fourth turned back S.. we went to camp then drove down the road a ways then hiked to Big Cave arriving about 11:30. At 11:05 I saw one over North slope. At 11:30 one was flying gliding 300' overhead when a duck hawk attacked it. The duck hawk made 6 success ive attacks from above the condor. The condor man flew glided fast toward Arundell Ridge & each time the hawk approached the condor twisted vertically, wings strongly flexed [illegible], so that side was presented to hawk. The condor snapped down immediately to level position after each twist - to the naked eye the motion looked like a complete "snap roll" but actually the condor did not turn over. The duck hawk desisted near Arundell Ridge. The condor flap glided & descended para llel to Arundell Ridge. This action commenced about 3/4 mile NE of the duck hawk's nesting site. At 12 m. Ed & I were in my tent blind 100' SW of lip of falls atop Big Cave. Sky was