Occasional Papers of the Museum of Zoology 13 



The vertebrates listed from this habitat are recorded from the 

 larger valleys in areas of typical niggerheads nearly free from 

 sphagnum and unmixed with any considerable amount of shrubs. 



Valley •willow-alder habitat and association: 



Bonasa umbellus yukonensis. Yukon ruffed grouse. Resident. 



Lagopus lagopus albus. Willow ptarmigan. Resident. 



Lagopus rupestris rupestris. Rock ptarmigan. Resident. 



Buteo lagopus sancti-johannis. Rough-legged hawk. Summer. 



Bubo virginianus lagophonus. Northwestern horned owl. Resident. 



Empidonax trailli alnorum. Alder flycatcher. Summer (Osgood, Black- 

 welder). 



Perisoreus canadensis fumifrons. Alaska jay. Resident. 



Loxia leucoptera. White-winged crossbill. Summer. 



Acanthis hornemanni exilipes. Hoary redpoll. Winter. 



A cant his linaria linaria. Redpoll. Resident, breeding. 



Passerculus sandwichensis alaudinus. Western savanna sparrow. Summer. 



Zonotrichia gambeli. Gambel sparrow. Summer. 



Zonolrichia coronata. Golden-crowned sparrow. Summer (Osgood). 



Spizella nionticola ochracea. Western tree sparrow. Summer. 



Junco hyemalis hyemalis. Slate-colored junco. Summer. 



Melospiza lincolni lincolni. Lincoln sparrow. Summer (Osgood). 



Passerella iliaca iliaca. Fox sparrow. Summer. 



Vermivora celata celata. Orange-crowned warbler. Summer. 



Dendroica cesHva rubiginosa. Alaska yellow warbler. Summer, breeding 

 (Osgood, Blackwelder). 



Dendroica coronata hoovcri. Myrtle warbler. Summer. 



Seiurus noveboracensis notabilis. Grinnell water-thrush. Summer. 



Wilsonia piisilla pusilla. Wilson warbler. Summer. 



Penthestes hudsonicus htidsonicus. Hudsonian chickadee. Resident. 



Regulus calendula calendula. Ruby-crowned kinglet. Summer. 



Planesticus migratorius migratorius. Eastern robin. Summer. 



Ixoreus ncemus meruloides. Northern varied thrush. Summer. 



Sorex personatus arcticus. Arctic shrew. 



Sorex obscurus obscurus. Mountain shrew. 



Ursiis americanus americanus. Black bear. 



Vulpes alascensis alascensis. Alaska red fox. 



Mustela arctica arctica. Arctic weasel. 



Mustela vison ingens. Alaska mink. 



Lutra canadensis canadensis. Canada otter. 



Lynx canadensis. Canada lynx. 



Synaptomys dalli. Dall lemming-vole. 



Evolomys dawsoni dawsoni. Dawson red-backed vole. 



Microtus pennsylvanicus drummondi. Drummond vole. 



Microtus operarius endoscus. Interior vole. 



