WBDavis 1935. 320. Salmon Creek, 8 mi. W Rogerson, Twin Falls Co., Idaho, May 13. that the nesting season had not yet arrived. The ova ranged in size from O down to o, and surely this condition would not occur in a brooding bird. Does the ♂ feed the ♀, or was the worm a stick for nesting materials). These two birds - Canyon Wrens - were new to me. The reddish brown back and breast and the contrasting white throat patch are distinctive. Collected in addition to the three wrens, a ♂ Chipping Sparrow and a ♀ Brewer Sparrow. Both of these were in the short sage on top of the c bluff, and appeared to be in small flocks - indicating that the nesting season had not yet arrived. The size of the ovaries bore this indication, too. Heard Vesper Sparrows. Saw two Ravens, a Sharp-shinned Hawk, a Western Red-tail, a Swainson Hawk, several Cliff Swallows, a Mourning Dove, and heard a Sage Thrasher. Horned Larks were noted along the highway yesterday just after we crossed into Idaho, and a few were around camp this morning.