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 op 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. 



Recent Avifauna of the Shasta Region 

 (Partial list from Upper Sonoran and Transition zones) 



Oreortyx picta (Douglas). 

 Lophortyx calif orniea (Shaw). 

 Dendragapus obscurus (Say). 

 Zenaidura macroura (Linnaeus). 

 Cathartes aura (Linnaeus). 

 Circus hudsonius (Linnaeus). 

 Buteo borealis (Gmelin). 

 Aquila chrysaetos (Linnaeus). 

 Faleo mexicanus Schlegel. 

 Faleo sparverius Linnaeus. 

 Bubo virginianus (Gmelin). 



Speotyto cunicularia (Molina). 

 Glaucidium gnoma Wagler. 

 Colaptes cafer (Gmelin). 

 Aphelocoma californiea (Vigors). 

 Cyanocitta stelleri (Gmelin). 

 Sturnella neglecta Audubon. 

 Eupbagus eyanocephalus (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: 



Aecipiter velox (Wilson). 

 Aecipiter cooperi (Bonaparte). 

 Astur atrieapillus (Wilson). 

 Buteo swainsoni Bonaparte. 

 Archibuteo ferrugineus (Lichten- 

 stein) . 



Haliaetus leucocephalus (Lin- 

 naeus). 



Gymnogyps californianus (Shaw). 



Faleo peregrinus Tunstall. 

 Alueo pratincola (Bonaparte). 

 Asio wilsonianus (Lesson). 

 Otus asio (Linnaeus) . 

 Geococcyx californianus (Lesson). 

 Corvus corax Linnaeus. 

 Corvus brachyrhynchos Brehm. 

 Cosmopolitan water birds 



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

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



