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NATURALIST'S GUIDE TO THE AMERICAS 



Colaptes chrysoides mearnsi, Mearns' 

 gilded flicker. 



Centurus uropygialis uropygialis, Gila 

 woodpecker. 



Dryobates scalaris symplectus, Texas 

 woodpecker. 



Platypsaris aglaiae aglaiae, rose- 

 throated becard. 



Otocoris alpestris pallida, Sonoran 

 horned lark. 



Otocoris alpestris diaphora, Tamaulipas 

 horned lark. 



Heleodytes brunneicapillus brunneicapil- 

 lus, Guaymas cactus wren. 



Heleodytes brunneicapillus couesi, Coues' 

 cactus wren. 



Thryothorus ludovicianus berlandieri, 

 Berlandier's wren. 



Toxostoma longirostris sennetti, Sen- 

 nett's thrasher. 



Toxostoma curvirostre curvirostre, curve- 

 billed thrasher. 



Toxostoma curvirostre palmeri, Palmer's 

 thrasher. 



Toxostoma lecontei lecontei, Leconte's 

 thrasher. 



Mimus polyglottos leucopterus, western 

 mockingbird. 



Polioptila plumbea, plumbeous gnat- 

 catcher. 



Auriparus flaviceps flaviceps, verdin. 



Xanthoura luxuosa glaucescens, Rio 

 Grande green jay. 



Dendroica aestiva sonorana, Sonoran 

 yellow warbler. 



Megaquiscalus major nelsoni, Sonoran 

 boat-tailed grackle. 



Icterus melanocephalus audubonii, 

 Audubon's oriole. 



Icterus cucullatus sennetti, Sennett's 

 oriole. 



Icterus cucullatus nelsoni, Nelson's 

 oriole. 



Amphispiza bilineata deserticola, desert 

 sparrow. 



Melospiza melodia fallax, desert song 

 sparrow. 



Arremonops rufivirgatus rufivirgatus, 

 Texas sparrow. 



Pyrrhuloxia sinuata sinuata, pyrrhuloxia. 



Pyrrhuloxia sinuata texana, Texan 

 pyrrhuloxia. 



Richmondena cardinalis superba, Ari- 

 zona cardinal. 



Richmondena cardinalis canicauda, gray- 

 tailed cardinal. 



c. Pinyon-Juniper Association (Upper 

 Austral Zone: Pinyon-Juniper Forest). 

 This association or zone occupies an 

 area mainly along the slopes of the 

 mountains above the limits of the 

 Covillea association. It includes most 

 of the oak woods, junipers, and pinyon 



pines, and may be regarded as a direct 

 extension of the pinyon-juniper asso- 

 ciation of the southwestern United 

 States. A small, isolated area, assign- 

 able to this association, occupies the 

 upper slopes of the mountains of the 

 Cape Region of Lower California, and 

 it occurs in a belt reaching sea level 

 on the Pacific side of the San Pedro 

 Martir Mountains in the northern 

 part of the peninsula. Its greatest 

 extension is along the flanks of the 

 Sierra Madre Occidental. 



Plants 



Pinus cembroides, pinyon. 



Juniperus californica, California 



juniper. 

 Juniperus pachyphloea, alligator-barked 



juniper. 



Juniperus ftaccida. 



Juniperus mexicana, Mexican juniper. 

 Cupressus arizonica, Arizona cypress. 

 Cupressus benthami, Bentham's cypress. 

 Juglans mollis, black walnut. 

 Hicoria mexicana, Mexican hickory. 

 Quercus reticulata. 

 Quercus arizonica, Arizona oak. 

 Quercus emoryi, Emory's oak. 

 Quercus mexiicana, Mexican oak. 

 Celtis reticulata, hackberry. 

 Morus microphylla, desert mulberry. 

 Isomeris arborea. 



Fallugia parodoxa, apache plume. 

 Cowania stansburiana. 

 Cercocarpus paucidentatus, mountain 



mahogany. 



Ceanothus greggii, Gregg's ceanothus. 

 Rhamnus tomentella. 

 Tilia occidentalis. 

 Sida neomexicana. 



Mammals 



Sorex lagunae, Sierra Laguna shrew. 

 Sorex californicus juncensis, Socorro 



shrew. 



Canis cagottis, Mexican plateau coyote. 

 Mustela frenata frenata, bridled weasel. 

 Onychomys torridus ramona, Ramona 



grasshopper mouse. 



Peromyscus truei gentilis, Jalisco long- 

 eared mouse. 

 Peromyscus californicus insignis, Dul- 



zura mouse. 

 Peromyscus truei lagunae, Sierra Laguna 



mouse. 

 Oryzomys couesi crinitus, Valley of 



Mexico rice rat. 

 Sigmodon minimus, buff-bellied cotton 



rat. 

 Neotoma albigula durangae, Durango 



white-throated wood rat. 



