Arnold, Steven J. 1945 16 June State of Chihuahua, Mexico via Mex. 45 Crossed border @ Juarez ~11:00AM. Between Juarez + Chihuahua saw 10 ravens @ widely spaced intervals. About 6 were in prs. + 4 solitary. Five were seen flying @ close range, all had their mouths open (i.e. bill agape). Two were seen sitting on fence posts; both w/ mouth closed. Reached Chihuahua ~ 6:10. Raven sighted @ 6:10 flying west w/ mouth closed. Possibly fly w/ mouth open during heat of day for evaporative cooling? One raven was seen drinking from cattle trough. [raven sighted 15 June 1945 between pening + Los Linderes N.M. also flying w/] mouth open Two cassowary (?) sighted between Chihuahua & Mcgui. 16 June 15 mi. NW Mcguir, Chihuahua, Mexico Stopped @ 6:45 to cook dinner. Filled up wash 6'deep x ~20' wide while Sage cooked dinner. Predominant plant in wash = mesquite. Sighted Blk-Throated Sparrow (Ammodisipiza bilineata) foraging among mesquites. Sighted pr. of Pyrrhuloxia (P. sinuata) in wash; ? calling. Twelve nighthawks were seen between 6:45 + 7:15PM when activity was markedly reduced (ie. few <1> individuals sighted after that time).