Borell 1964 Ojo fajuna, 5200 ft Chihuahua, Mex. May 11 Cold night, clear calm morning 44 deg F at 7 am. Went to Chihuahua. Birds noted before we left at 9:30 am: Chipping Sparrow - 1 Orchard Oriole - 3 & Bullock Oriole common, one & gathering nesting material - saw no territorial squabbles yestdy or this am. Western Tanager 4 & at one tree on the brush pile under which we have pineapple trimmings. Saw only one & yellow warbler 2 & singing, one & White Cr. Sparrows - 20 around feed area some singing. Wilson Warbler - 4, number is down. Townsend Warbler - 1 Barn Swallows 2 & came to our pool side to gather nesting mud. Bronzed Cowbird 1 & Saw it at close range with binoculars. Noted its larger size & red eye, also saw it inspect a Bullock Oriole (partially completed) nest. It departed before I got a shot. Blackheaded Grosbeak 3 & 1 &