Cogswell 1949 Aquila chrysaetos 2 Feb. 22- 12 mi. SE of Livermore, Alameda Co., Calif. a single eagle, in adult (golden-headed) plumage was “playing” on the breeze over the ridge E of Arroyo Mocho. He would soar up to a considerable height, fold his wings so that the tips were in by the body & only the wrist area extended laterally, and then plummet downward several hundred feet —only to swerve up again for a repeat process. Sometimes he flapped about 12-15 rapid strokes toward the end of the up-glide. The weather was threatening, with dark clouds high over Mt. Hamilton to the south, & those same cloud banks being rift in several places over the area here, probably creating excellent up- drafts. This is the closest thing to real play I have ever seen in a hawk flying alone. - approx. 8 mi. along hwy US-50, NNE of Livermore 2 eagles in adult plumage soaring low over the hillsides, now showing green thru the brown. These were within 1 mile of each other, both obviously foraging. Dec. 11- 4 mi. SE Gustine Merced Co., Calif.- an eagle sailed & flapped @ low altitude over duck