A 5 year investigation of the relationships between marten population fluctuations, food habits, & prey densities 

 in Glacier NP. Foods were mostly mammals-Cricetidae. Varied with season & availability; population trends 

 strongly influenced by prey densities. SYNAPTOMYS BOREALIS was trapped in 2 of 5 years trapping was 

 done. Marten scats contained SYNAPTOMYS BOREALIS at a 1.6% frequency during the study, while 

 lemmings comprised only 2 of 223 small mammals trapped. 



Wetzel, R. M. and H. L. Gunderson. 1949. The lemming vole, SYNAPTOMYS BOREALIS, in 

 northern Minnesota. J. Mammal. 30:437. 



Gives locations for 1 immature female (5 Aug 1932) and 1 adult male (27 July 1948). 



Wilson, C, R. E. Johnson, and J. D. Reichel. 1980. New records for the northern bog lemming in 

 Washington. Murrelet 6 1 : 1 04- 1 06. 



Describes 3 new sites for SYNAPTOMYS BOREALIS in V/ashington. One individual (immature, sex 

 unknown) was collected 22 Jun 1979 in a wet (standing water) hummocky sedge meadow with willow and bog 

 birch at 6100 ft. On 25 June 1980 an adult male was collected at a similar site (less hummocky, no bog birch) at 

 5400 ft, about 6 mi from the first site. At both these sites MICROTUS PENNSYLVANICUS was also trapped. 

 An immature female was captured at the third site (extreme NE WA) at 7250 ft on 23 Aug 1980. The habitat 

 was a barren alpine ridge (15% vegetative cover) at least 900 vertical ft above the nearest boggy meadow. 



Wright, P. L. 1950. SYNAPTOMYS BOREALIS from Glacier National Park, Montana. J. 

 Mammal. 31(4) :460. 



First record of northern bog lemming in Montana. Adult male caught. HABITAT: a swampy area; plants 

 included Englemann spruce, timothy, false hellebore, alder, nannyberry, cow parsnip, horsemint, yellow monkey 

 flower, and snowberry. ASSOCIATED SPECIES included: MICROTUS PENNSYLVANICUS and SOREX 

 VAGRANS. TRAPPING SUCCESS: 1 lemming in 62 trap-nights; not found at same site during 200 trap-nights 

 2 months later. 



Wrigley, R. E. 1974. Ecological notes of animals of the Churchill region of Hudson Bay. Arctic 

 27:201-214. 



One SYNAPTOMYS BOREALIS collected in sedge-moss tundra 35 mi. NW of Churchill. 



Youngman, P. M. 1964. Range extensions of some mammals from northwestern Canada. Natl. 

 Mus. Can., Nat. Hist. Paper 23. 6 pp. 



For SYNAPTOMYS BOREALIS: lists far north records including Old Crow and Rampart House, Yukon, the 

 farthest know north records for the species at the time. 



Youngman, P. M. 1968. Notes on mammals of southeastern Yukon Territory and adjacent 

 Mackenzie District. Natl. Mus. Can. Bull. 223:70-86. 



For SYNAPTOMYS BOREALIS: collected in the N. W. T.: 1) a male and nonparous female in a hot spring 

 meadow with MICROTUS PENNSYLVANICUS and M. LONGICAUDUS at 4000 ft. Flat River; 2) one at a 

 marsh at Glacier Lake, 2500 ft; in the Yukon: 3) a male in riparian brushlands 5 mi E of Little Hyland River, 

 6000 ft and a male at 4000 ft; 4) 11 males and 4 females in white spruce at North Toobally Lake, 2200 ft. 



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