Subspecies and Distribution. S.b.borealisJ.Richardson,1828—NorthwestTerritories,extremeSWNunavut,NEBritishColumbia,N&CAlberta,WSaskatchewan,andNManitoba,Canada. S.b.artemisiaeR.M.Anderson,1932—extremeSCBritishColumbia,Canada. S.b.chapmani].A.Allen,1903—SEBritishColumbiaandSWAlberta,Canada,andNEWashington,NIdaho,andNWMontana,USA. S.b.dalliMerriam,1896—C,SC,&SWAlaska,USA,andYukonandN&CBritishColumbia,Canada. S.b.innuitusTrue,1894—NQuebec,Canada. S.b.medioximusBangs,1900—NEQuebecandLabrador,Canada. S.b.smithiR.M.Anderson&Rand,1943—N&ECSaskatchewan,mostofManitoba,andNOntario,Canada,andNENorthDakotaandNWMinnesota,USA. S.b.sphagnicolaPreble,1899—SEQuebecandNewBrunswick,Canada,andMaineandNewHampshire,USA. S. b. truei Merriam, 1896 — SE Alaska, coa...
Subspecies and Distribution. P.t.trueiShufeldt,1885—SCOregon,NE&extremeECalifornia,mostofNevada,E&SU...
Subspecies and Distribution. M.m.montanusPeale,1848—SCOregon,NE&ECCalifornia,andWNevada,USA. M.m.amo...
Subspecies and Distribution. N.i.insignisG.S.Miller,1891—ECanada(fromNewBrunswick,PrinceEdwardIsland...
Subspecies and Distribution. S.c.cooperiBaird,1858—SEManitoba,SOntario,SQuebec,NewBrunswick,andNovaS...
Subspecies and Distribution. D.g.groenlandicusTrail,1823—ENunavut,includingEQueenElizabethIs,Princeo...
Subspecies and Distribution. M.t.townsenduBachman,1839—fromSWBritishColumbia,Canada,StoHumboldtBay,N...
Subspecies and Distribution. P.u.ungavaMerriam,1889—C&EManitoba,Ontario,Quebec,andNNewfoundland,Cana...
Subspecies and Distribution. L.t.trimucronatusJ.Richardson,1825—NYukon,NorthwestTerritories,Nunavut,...
Subspecies and Distribution. P.k.keeniRhoads,1894—GrahamandMoresbyIs,BritishColumbia,Canada. P.k.alg...
Subspecies and Distribution. S.c.cinereusKerr,1792—N&EAlaskaE&SthroughmuchofCanada(includingNewfound...
Subspecies and Distribution. B.b.brevicaudusSay,1823—SWOntarioandextremeSEManitoba(Canada)andmostofN...
Subspecies and Distribution. P.i.intermediusMerriam,1889—fromW BritishColumbia,Canada,SEtoNNewMexico...
Subspecies and Distribution. M.o.oregon:Bachman,1839—WWashington,WOregon,andNWCalifornia,USA. M.o.ad...
Subspecies and Distribution. U. a. americanus Pallas, 1780 — Alaska to E Canada and E USA. U. a. alt...
Subspecies and Distribution. N.c.cinereaOrd,1815—extremeSEBritishColumbia,SAlberta,andextremeSWSaska...
Subspecies and Distribution. P.t.trueiShufeldt,1885—SCOregon,NE&extremeECalifornia,mostofNevada,E&SU...
Subspecies and Distribution. M.m.montanusPeale,1848—SCOregon,NE&ECCalifornia,andWNevada,USA. M.m.amo...
Subspecies and Distribution. N.i.insignisG.S.Miller,1891—ECanada(fromNewBrunswick,PrinceEdwardIsland...
Subspecies and Distribution. S.c.cooperiBaird,1858—SEManitoba,SOntario,SQuebec,NewBrunswick,andNovaS...
Subspecies and Distribution. D.g.groenlandicusTrail,1823—ENunavut,includingEQueenElizabethIs,Princeo...
Subspecies and Distribution. M.t.townsenduBachman,1839—fromSWBritishColumbia,Canada,StoHumboldtBay,N...
Subspecies and Distribution. P.u.ungavaMerriam,1889—C&EManitoba,Ontario,Quebec,andNNewfoundland,Cana...
Subspecies and Distribution. L.t.trimucronatusJ.Richardson,1825—NYukon,NorthwestTerritories,Nunavut,...
Subspecies and Distribution. P.k.keeniRhoads,1894—GrahamandMoresbyIs,BritishColumbia,Canada. P.k.alg...
Subspecies and Distribution. S.c.cinereusKerr,1792—N&EAlaskaE&SthroughmuchofCanada(includingNewfound...
Subspecies and Distribution. B.b.brevicaudusSay,1823—SWOntarioandextremeSEManitoba(Canada)andmostofN...
Subspecies and Distribution. P.i.intermediusMerriam,1889—fromW BritishColumbia,Canada,SEtoNNewMexico...
Subspecies and Distribution. M.o.oregon:Bachman,1839—WWashington,WOregon,andNWCalifornia,USA. M.o.ad...
Subspecies and Distribution. U. a. americanus Pallas, 1780 — Alaska to E Canada and E USA. U. a. alt...
Subspecies and Distribution. N.c.cinereaOrd,1815—extremeSEBritishColumbia,SAlberta,andextremeSWSaska...
Subspecies and Distribution. P.t.trueiShufeldt,1885—SCOregon,NE&extremeECalifornia,mostofNevada,E&SU...
Subspecies and Distribution. M.m.montanusPeale,1848—SCOregon,NE&ECCalifornia,andWNevada,USA. M.m.amo...
Subspecies and Distribution. N.i.insignisG.S.Miller,1891—ECanada(fromNewBrunswick,PrinceEdwardIsland...