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 $4 THE CONDOR Vol. XVi Center Street entrance. During the summer months old and young forage con. spicuously over all open ground for grasshoppers and army worms. C, ALIFORNIA PURPI.E FINCH. Carpodacus pnrpureus californicus. Common resident. Found foraging quietly during fall and winter in the upper reaches of the ravines among the hills. In spring and summer the species occurs among trees, especially pine and cypress, on many parts of the lower Campus, where dur- ing the months of April and May its. loud song is notably in evidence. March 7, 19I I, the full song was first heard for that season (J. G.). CALIFORNIA LINNET. Carpodacu.s mexicanus frontalis. Common resident, occurring up on the hills in fall and winter, and scattered over the lower 'Campus in the breeding season. Here they nest about the ivy-clad buildifigs. Ten pairs were estimated to be nesting around the old Chemistry building in I9I. AERlCAN CROSSBILL. loxis, eurvirostra minor. Irregular winter visitant. On February 7, I99, and for at least ten days previously, several small flocks were to be seen high about the tops of the evergreens around the Greek Theatre and near the Center Street entrance. WLLOW GOLDFINCH'. Astragalinus tristis salicamans. Known to be regu- larly resident in the San Francisco Bay region, but as far as the Campus is con- cerned reported during the summer only. Earliest record, April 26, 913, and latest, October I2, 1912 (A. S.A.). Many are to be seen in July on the hillsides towards the head of Strawberry Creek canyon, feeding on.thistle-heads in com- pany with linnets. GREEN-BACKED GOLDFINCH. Astragalinus psaltria hesperophilus. Common resident, occurring in flocks in patches of star-thistle on the hillsides in winter, and at other seasons scattered over the Campus generally, even along the city streets, in pairs or small companies. Often seen feeding fearlessly on dandelion heads on lawns. Nests are built frequently in garden trees, as also in live oaks. Occupied nests have been noted in May and July. Two nests containing young were observed the last week in August, 9o8 (J. G.). This bird bears the book-- name of "Arkansas" Goldfinch, as well as the above more appropriate one. LAWRENCE Gq3LDFINCH. [8tYrllgs,linu8 lawrencei.' Observed only as a sum- .ruer visitant. In June and July, 9o9, several pairs were repeatedly seen among live-oaks up Strawberry Creek (J. G.).' ' ' PINE SISKI. 8pinu- pinu. pinus. Common resident, often associating with the Green-backed Goldfinch. In winter the two species are to be met with in large mixed flocks on the hillsides. February 7, I99, a dense flock of fully was foraging on the bare ground near the crest of a ridge. Every now and then they would rise in a cloud and attempt to fly across the ridge against the stiff westerly wind, but, apparently failing, would be swept back over the crest, to alight again on the ground. Often observed in spring and summe feeding on dandelion heads on lawns. A nest was discovered in a pine in June, and many yellow-suffused young on .the wing were observed by August 4 (9 TM) (J' G.). This is another bird of ordinarily Boreal habitat, which finds the cool Berke- ley climate to its liking and thus helps to lend a northern complexion' to our fauna. ENCLlStt S?ARROW. lasser domestiqus. Abundant resident on the lower portion of the Campus. Flocks forage up onto the hills in late summer and fall. Not yet seen up Strawberry Creek beyond the swimming pool. Numbers nota- bly increasing during the past six years. Increase of this exotic interloper is cor- related significantly with tiecrease in numbers of certain native birds. As yet nests are located almost exclusively about the ivy-covered buildings. Breeds from April to A:gust.