24 University of MicJiigan 



Cultivated fields are rare in interior Alaska, but they are 

 increasing in number and size. The only vertebrate record at 

 hand from this habitat is that of the pipit, of which a small fl^ck 

 was seen in a plowed field in the Yukon Valley at Tanana. 



Edificarian habitat and association: 



Sayornis say us. Say phoebe. Summer (Osgood). 



Perisoreus canadensis fumifrons. Alaska jay. Resident. 



Corvus carax principalis. Northern raven. Winter. 



Passerculus sandu'ichensis alaudinus. Western savanna sparrow. Sum- 

 mer (Osgood). 



Zonotrichia gambcli. Gambel sparrow. Summer. 



Passerella iliaca iliaca. Fox sparrow. Summer. 



Petrochelidon lunifrons Innifrans. Cliff swallow. Summer, breeding. 



Tachycineta thalassina lepida. Northern violet-green swallow. Sum- 

 mer, breeding (Osgood). 



Plancsticiis migraiorius migratorius. Eastern robin. Summer (Osgood). 



Sorex pcrsonalus arcticus. Arctic shrew. 



Sorex obscurus obscurus. Mountain shrew. 



Microsorex cximiiis. Alaska microsorex. 



Mustela arciica arctica. Arctic weasel. 



Muslela vison ingens. ^Alaska mink. 



Evotamys daivsoni dawsoni. Dawson red-backed vole. 



Rattiis narvegiciis. Norway rat. 



Sciurus hudsoniciis hudsonicus. Northern red squirrel. 



Several species of vertebrates are closely restricted to the 

 vacinity of buildings, and a number of other species sometimes 

 make use of buildings either as places of refuge or as places of food 

 supply. To designate this habitat and association the name 

 edificarian is proposed. The habitat includes the buildings of 

 whatever sort erected by man, and the immediately adjacent areas. 

 This would include the streets of cities and the yards of houses 

 with their planted lawns, gardens, and shade trees. However, it 

 does not seem desirable to include in the habitat parks, orchards, 

 or cultivated fields away from the near vicinity of buildings. 



Buildings and towns are rare in Alaska, so the habitat is 

 extremely small in area. Nevertheless, at least one species of 

 mammal, the Norway rat, is restricted to it, and a number of 

 species of other mammals and birds either nest or feed in or around 

 buildings. 



