Gymnogyps californicus February 6, 1946 Hopper Canyon, Calif. Upper Cader Canyon near Two Pikes. We hiked down the canyon to Cader Falls & then saw 5 cardors on Whitewash Ledge (2 ad, 1 imm.), an imm. atop the cliff above them, & an adult 100' to W. of the falls on cliff top. We stood still in full view after about 3 minutes, the one adult took off, cirled, & landed on Whitewash Ledge using the landing flaps. Left foot slipped in landing & was draught up again quickly. The youngster atop the cliff took off & then the others, but not he- for another imm. (a left rectry missing) be- gan circling above Cader Falls, & 3 new birds approached from N± - at least 8 cardors; at least 4 imm. These left around Cader Cliff, thn 5 returned, circled low over us & Post Tree, then all left (about 3:20). We found cador tracks near the falls broke on both sides of the pool, but none over 20" from break, & comparatively few tracks - made by 3 birds at least I judged. One "step" measured about 2" from center toe to rear toe; was about 2" off- set. At 3:30 we left for the road at Two Ps., hiking up the rock ledges above N. Cader Cliffs. I saw 2 or 3 cardors in top of one Ps. on Arundell Ridge - probably the birds we sawed from the falls roosted there. Sove for