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 152 THE CONDOR Vol. XIX state the results of the trip. Sheldon arrived in camp on March 2, and broke camp for return to Denver March 25, devoting his time in the interim exclu- sively to this subject, making copious daily notes of observations, including olher birds seen, and covered the same and vastly more territory than last year. He sav but very few nutcrackers. some days none. Saw at different times two mountain lions and num- Fig. 51. YOUNG CLARKE NUTCRACKERS NEST. ONE OR /IORE FREQUENTLY FLUT- TERED OUT OF THE NEST WIrILE TIrE PIrOTO- GRAPIt WAS BEING TAKEN. Bluebird. Found freshly made Crow's nest. bers of deer; also two par- tial carcasses of deer killed by mountain lions. He records finding fif- teen last year's nests, but could find practically no pinyon nuts, the chief food of old and young while nest- ing, evidencing no nut crop during the previous year, a condition to which we ascribe the scarcity of nest- ing birds this season. The following are extracts from his notes: "March 9th. Found paunch, bones and other re- mains of deer freshly killed by momtain lion, an ac- count of the killing being plainly told in the snow. Clarke Crows feeding on re- mains of deer. Two deer seen and tracks abundant. Saw Pinyon Jays and Clarke Crows making a big fuss over something, and on in- vestigation found it to be a Great Horned Owl perched in a pinyon, which refused to move at my coming upon the scene. Clouding up and wind fierce. Beaver work- ing on the creek, an mmsual occurrence. "March 13th. Weather clear and first sign of spring. Saw first Mountain While at the nest the bird came in with her beak full of fibres of bark, but upon seeing me she flew away. I retreated from close vicinity and vatched from a distance through glasses. Both birds brought in material, and, I think, finished the nest, as this perform- ance ceased after two trips were made. "March 14th. New nest found yesterday contained one egg; bird on