▁resident ▁or ▁as ▁migr ants . ▁With ▁ 1 1 2 ▁m amm al ▁species , ▁Al aska ▁ranks ▁ 1 2 th ▁of ▁the ▁ 5 0 ▁U . S . ▁states ▁in ▁m amm al ian ▁divers ity . ▁ ▁This ▁article ▁presents ▁the ▁common ▁and ▁scientific ▁names ▁for ▁each ▁species , ▁along ▁more ▁information ▁about ▁the ▁animal . ▁ ▁Where ▁the ▁species ▁is ▁unique ▁to ▁Al aska , ▁this ▁article ▁presents ▁a ▁brief ▁over view ▁of ▁the ▁species . ▁ ▁Where ▁the ▁species ▁is ▁not ▁unique ▁to ▁Al aska , ▁this ▁article ▁gives ▁information ▁about ▁the ▁hab its ▁and ▁distribution ▁that ▁are ▁characteristic ▁of ▁animals ▁occurr ing ▁in ▁the ▁state . ▁ ▁The ▁range ▁maps ▁that ▁accomp any ▁the ▁descri ptions ▁vary ▁in ▁their ▁precision ▁according ▁to ▁the ▁sources ▁on ▁which ▁they ▁are ▁based . ▁ ▁Read ers ▁are ▁ad vised ▁to ▁click ▁on ▁the ▁maps ▁and ▁examine ▁the ▁source ▁information ▁for ▁more ▁information ▁on ▁the ▁species ' ▁ranges . ▁ ▁Sor ic omorph s ▁Al aska ▁sh rew s ▁have ▁not ▁been ▁studied ▁as ▁much ▁as ▁most ▁of ▁its ▁animals , ▁so ▁many ▁particular s ▁of ▁their ▁distribution , ▁bre eding ▁cycles , ▁and ▁population ▁remain ▁unknown . ▁ ▁Currently , ▁ten ▁species ▁of ▁sh rew s ▁have ▁been ▁identified ▁in ▁Al aska , ▁but ▁debate ▁remains ▁over ▁their ▁identity ▁and ▁gen etic ▁relationships . ▁ ▁All ▁of ▁Al aska ' s ▁sh rew ▁species ▁look ▁al ike ▁to ▁lay ▁obser vers , ▁but ▁exper ts ▁differenti ate ▁them