PLATE OPPOSITE PAGE 



7. Cassin and California pvirple finches and California Linnet 422 



8. Some sparrows of the Yosemite section 454 



9. Warblers of the Yosemite section 518 



10. Some small birds of the Yosemite forests 566 



11. Townsend Sohtaire and Russet-backed and Sierra Hermit thrushes 598 



12. Coral King Snake; Western Skink, young and adult 630 



Plates, Half-tone 

 (in signatures at end of text) pace 



13. Merced River bottom near Snelling; blue oak in winter, with mistletoe 671 



14. Digger pine association near Pleasant Valley; edge of yellow pine association three 



miles east of Coulterville 673 



15. Golden oak association near Rocky Point; south bank of Merced River near El 



Portal 675 



16. Yosemite Valley from Big Oak Flat road, with golden-oak talus in foreground; 



meadow and cottonwood associations in Yosemite Valley 677 



17. Jeffrey pine and huckleberry oak associations east of Half Dome; white fir associa- 



tion near Chinquapin 679 



18. Vogelsang Lake and Pass; Tuolumne Meadows 681 



19. Mounts Gibbs and Dana from the east; Williams Butte near Mono Lake 683 



20. Navigator, Yosemite and Dusky shrews 685 



21. Bats of the Yosemite Valley and higher Sierra Nevada 687 



22. Tracks of Black Bear in Yosemite Valley 689 



23. Pacific Fi.sher, Sierra Pine Marten and Sierra Nevada Wolverine 690 



24. California Badger and its work 691 



25. Boyle and Common white-footed mice and House Mouse 692 



26. Some "leaping" rodents of the Yosemite section 693 



27. Yosemite Pocket Gopher and Yosemite Mole 695 



28. Surface workings of mole and pocket gopher 697 



29. Yosemite Pocket Gopher in action 699 



30. Winter earth cores made by pocket gophers 701 



31. Sierra Mountain Beaver and its burrow 702 



32. Southern Sierra Marmot 703 



33. Long-eared Chipmunk and California Gray Squirrel 704 



34. California Gray Squirrel 705 



35. Cones of white fir exhumed from caches made by Sierra Chickaree; twig tips of 



lodgepole pine cut by Sierra Chickaree 707 



36. Granite talus at head of Lyell Canon, home of Yosemite Cony; kitchen middens on 



log where Sierra Chickaree had been dissecting red fir cones 709 



37. Work of Yellow-haired Porcupine; work of Golden Beaver 711 



38. Yosemite Cony and its lookout station ■. 712 



39. Mountain Coyote; Mule Deer 713 



40. Records in the road 715 



41. California Gulls on Paoha Island, Mono Lake 717 



42. Long-eared Owls 718 



43. Band-tailed Pigeons; Nuttall Poorwill; Great Gray Owl 719 



44. Principal diurnal birds of prey in the Yosemite region 720 



45. Nests and eggs of Swainson Hawk and Texas Nighthawk 721 



46. Hummingbirds, Swallows, and White-throated Swift •. 723 



47. Nests of Cliff Swallow and California Linnet 724 



48. Mariposa Fox Sparrow, Green-tailed Towhee, and Sacramento Spurred Towhee.. 725 



49. Nests of Green-tailed Towhee and Northeastern Lincoln Sparrow 726 



50. Vireos of the Yosemite region 727 



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