PEARSON 1951-1952 sternops opeinus (3) [Diagram of bird behavior steps labeled 1-7] some or 3 but pile moved back some (7) to make room for more associates so far in the pure desert have been 3499 (Puma minor?), Tinnamutia, scincus, and albino. In the neighboring feature- rock habitat add 3500 (cuth-robber?), [illegible], and Thinicornis. Jan.12 Two in front of bus started digging about 6:30 a.m. (down about 5:00). Two others near my observation rock at 6:45. One of these worked rather steadily until 7:45 and had made a fairly good-sized pile by then. It then appeared at another hole about 15 feet away and first grazed a little, then dug. Two others nearby (one about 20 yds and the other 30 yds beyond it) were still digging at 8:00. A half grown young appeared near my perch about 7:45, sticking head out of feeding hole and apparently grazing a little. It was quite shiny black with practically no brown - looked somewhat like a sea-bird. It then appeared about 3 feet away at a feeding hole under a feature and here it ground off several tufts of feature awlins at the bottom and each time disappeared down the hole with them. On my census area at 10 found 20 new diggings, all