Erickson 1934. Amphispiza bilineata desortcola Nest base of Castle Dome, Yuma Co., Arizona. Jan. 10, 1934. a flock of 5+ seen in creosote and mesquite at base of small hill near buildings; flew into dense brush; slow, as I approached. after 5 mins. two seen on ground foraging; as I moved flock lifted clump an flew down gully, moving 15 yds all told but from bush to bush; two perched in last end of this bush row; perched quietly, eyeing me, several minutes, then took off and flew 50-70 through open to nearly other scattered creosote bushes; two others followed; a fifth still in bushes followed others after about 2 min. A nitobaguito, Pima Co., Ariz. Jan. 26, 1934. a number of individuals seen on mead north of spring. Barquahala Mts; 3000 ft. Yuma Co., Ariz. Feb. 15, one collected from flock foraging in brush along wash. Chrenburg, 288 ft., Yuma Co., Ariz. Feb. 21. flock seen in gravel hills of meza 3 mi. south of Ehrenbry, foraged on ground under creosote bushes, of 6+ only one in adult plumage. 1/2 mi. east of Quartzsite, Yuma Co., Ariz. Feb. 27. one singing, flock in vicinity; other so far as seen indifferent to song.