22. Current Distribution of the Sage Grouse 23. Sequence of the Ventro-forward Display of the Sage Grouse 24. Current Distribution of the Blue Grouse 25. Current Distribution of the Spruce Grouse 26. Current North American Distribution of the Willow Ptarmigan 27. Current North American Distribution of the Rock Ptarmigan 229 28. Current Distribution of the White-tailed Ptarmigan 29. Current Distribution of the Ruffed Grouse 258 30. Drumming Display and Rush Display of the Ruffed Grouse 269 31. Current Distribution of Prairie Chickens 278 32. Current and Recent Distributions of the Sharp-tailed Grouse 33. Current Distributions of Tree Quails 34. Distribution of Available Records of the Barred Quail 35. Distributions of Mountain and Barred Quails 36. Current Distribution of the Scaled Quail 359 37. Current Distribution of the Gambel Quail 379 38. Distributions of the California and Elegant Quails 39. Current Continental Distributions of Bobwhites 40. Distribution of Bobwhites in Southern Mexico and Adjacent Areas 41. Current Distribution of the Spotted Wood Quail -+-+xi++Museum of Vertebrate Zoology, the Los Angeles County Museum, the Denver Museum of Natural History, the James Ford Bell Museum of Natural History in Minneapolis, and the Chicago Zoological Park. The Cornell University Laboratory of Ornithology very kindly allowed me to reproduce a previousIy unpublished painting by L.A. Fuertes, and in addition provided copies of several sound recordings. Nearly all of the United States and Canadian game and wildlife agencies provided me with information about hunting seasons and, in many cases, data on estimated upland game harvests. The Secretaria de Agricultura y Ganaderia of Mexico and its director general, Dr. R. H. Corzo, facilitated my Mexican field work and provided the necessary permits for collecting specimens. Among the individuals who have personally assisted me I am particularly indebted to C. G. ("Bud") Pritchard, who painstakingly prepared five of the color paintings included in the book, and whose meticulous attention to the smallest details of feather and soft-part characteristics unfortunately cannot be adequately reproduced by the printing process. Likewise, on short notice John O'Neill set aside his other obligations to produce two stunning paintings of Mexican quail species that testify both to his great artistic abilities and to his personal familiarity with these tropical forest birds. Without the splendid paintings by these artists the book would have much less value and attractiveness. Charles Hjelte of the Colorado Department of Natural Resources very kindly allowed me to reproduce three excellent paintings done for that department by Dexter Landau, for which I am most grateful. Other persons who personally helped me are too numerous to mention individually, but I cannot neglect Andrew Prieto or Edmund Sallee, who accompanied me on my Mexican trips, or Clait Braun, James Inder, and John Lewis, who assisted me with my field work in the United States and Canada. Dr. Starker Leopold gave me val...