1. Cade 1959 Falco peregrinus 12 May Chena Bluffs, College, Alaska Pair of adults was seen flying around the bluffs below the old trading post. Fresh remains: ruffed grouse, 13 May Chena Bluffs - arrived the cliff for nesting. The small, low shelf ca 2 x 2 feet square & sloping out rather abruptly - used in 1951 was not occupied and showed no recent usage. The large shelf where numerous remains of previous were found in 1953 measures as follows: 10 ft across at the back and 4 ft wide at widest point - slope very gently outward - covered with chist chips 4-8" dia- metr down to dirt particles. One fresh peregrine in coope end of the upper end of shelf - places for 2053 other ravages on the ledge, ledge is 75 feet above river and 40 feet below the bluik - not accessible w/o rope, diagram of ledge at least 2 other 2 x 2 foot sites are available on the same cliff - no indication that eggs were present - falcons showed little concern over my presence on cliff.