Bellied Flower (counted 70, scattered over a dry field - a few in full plumage.), Arreets 15, Yellow-legs 3, Marsh Hawks - many, Spar. row Hawks (several), Ferruginous Roughlegs 2 (near Los Felice lake at W. end of Pacheco Pass. Red brown back, migo, & tail.) Turkey Buzzards - many Burrowing Owls 2, Yellow-billed Magpies 8-10 (west of summit of Pacheco Pass), Shrikes - many (others found nest with full set of eggs), Western Kingbirds 2, Black Phoebes many, Barn Swallows building under bridges, Cliff Swallows less ab., Tree Swallows - various drifting northward, esp. in Pacheco Pass, Violet-green Swallows " " " , esp in San Joaquin Valley - W. Robin 1 Pacheco Pass, Mock- ingbirds, San Joaquin Valley - many; Thrasher, Titmouse . Vigors War, W. Bluebird, Cal. Jay in Pacheco Pass, Brewer Blackbird everywhere, Red- negid Bluebirds ab. Tricolored Blackbirds - a large flock in field near Mendota - in dull plumage- (notes very different from others - a chorus of "prolonged" galling notes could be heard a long way off as birds were settled in a willow.) Song Sparrow, Gambel Sparrow (sev. flocks in San Joaquin) Lark Sparrow (1 seen while we were driving), Green- backed Goldfinches (large flocks in fields) Willows Goldfinches (flocks) Round Larks (mating), Meadow Larks (seemed to be nesting), Lanioto (or mites, miles from a house). English Sparrows, Crows (in several pieces in pass and valley. We did not stop to look for birds ex- cepts geese and cranes - others were incidental - I was much impressed by the large numbers of old nests visible in the bare trees in the San Joaquin Valley. So many trees had several nests and so few had none.