113 Sparrow, Prairie Falcons (jr.) Sparrow Hawk, Vigoro Wren. A quail hiding back from the oak tree was trounded by a precipice of sandstone on west, and by a tree coverd slope on east. On the east slope which must have contained springs there were many maidens- hairferns. As we neared Corrall Hollow we came to a valley branching south with a small stream in it where there were evidences of coal mining in the past (Tesla?) The stream had cut the sides of the valley, esp. on west side. We saw a Rock Wren entering a hole in this cut near the top. It was the nest of a Rock Wren. When Mr. McCabe climbed up a look onto the opening the male flew almost into his face as she came out. The nest was lined with brown sheep's wool and contained six eggs. Several males were singing and we came within ten or fifteen feet where he perched on a flattish stone and sang repeatedly. The song is very similar to that of a mockingbird (without imitations) but softer. Among the tree Tobacco(yellow flowers) there are garters on in Corrall Hollow there were many Hummingbirds - Distinguished Rufous (water full plumage) and Anna's. Many Western King- brids, Meadowlarks, Chiricles between Superior and Corrall Hollow. April 10. Went to Boulder Creek. Grosbeak, Olive-sided Fly catcher, Black-throated Gray Warblers in Head pop. Three warbling Vireo at once. Apr. 12. Near Pleasanton. many migrating White-crows. Apr. 13. Berkeley. Tolema Warbler near house, singing. Failed to find any nest among ferns (see Apr. 10) 20) Heard song of Grosbeak in distance (west). Purple Finch building and young Sang Sparrow out on Campus.