84 University of California Publications in Geology [VOL. 7 



during the Pleistocene period and that the specimens obtained 

 from the various horizons represent in the aggregate, with a 

 considerable degree of accuracy, the avifauna of the Pacific 

 coast at that time. 



RELATION OF PLEISTOCENE FAUNAS TO THOSE OF THE PRESENT 



DAY 



A partial list of the Recent birds of the Transition zone in 

 the Shasta region is given in the report of a biological survey 

 of the region by C. H. Merriam. 18 The list is appended here 

 and the more striking differences displayed by the other locali- 

 ties are noted. This comparison may prove of interest in con- 

 sidering the fossil avifauna. 



EECENT AVIFAUNA OF THE SHASTA REGION 

 (Partial list from Upper Sonoran and Transition zones) 



Oreortyx picta (Douglas). 

 Lophortyx calif ornica (Shaw). 

 Dendragapus obscurus (Say). 

 Zenaidura macroura (Linnaeus). 

 Cathartes aura (Linnaeus). 

 Circus hudsonius (Linnaeus). 

 Buteo borealis (Gmelin). 

 Aquila chrysaetos (Linnaeus). 

 Falco mexicanus Schlegel. 

 Falco sparverius Linnaeus. 

 Bubo virginianus (Gmelin). 



Speotyto cunicularia (Molina). 

 Glaucidium gnoma Wagler. 

 Colaptes cafer (Gmelin). 

 Aphelocoma californica (Vigors). 

 Cyanocitta stelleri (Gmelin). 

 Sturnella neglecta Audubon. 

 Euphagus cyanocephalus (Wagler). 

 Lanius ludovicianus Linnaeus. 

 Planesticus migratorius (Lin- 

 naeus). 



To this list may be added the following species which possibly 

 occur in the locality, though not recorded by the collectors of 

 the survey party: 



Accipiter velox (Wilson). 



Accipiter cooperi (Bonaparte). 



Astur atricapillus (Wilson). 



Buteo swainsoni Bonaparte. 



Archibuteo ferrugineus (Lichten- 

 stein). 



Haliaetus leucocephalus (Lin- 

 naeus). 



Gymnogyps calif ornianus (Shaw). 



Falco peregrinus Tunstall. 

 Aluco pratincola (Bonaparte). 

 Asio wilsonianus (Lesson). 

 Otus asio (Linnaeus) . 

 Geococcyx calif ornianus (Lesson). 

 Corvus corax Linnaeus. 

 Corvus brachyrhynchos Brehm. 

 Cosmopolitan water birds 



is Merriam, C. H., Eesults of a Biological Survey of Mt. Shasta, Cali- 

 fornia, N. Am. Fauna, No. 16, 1899. 



