We chemically immobilized a free-ranging moose subspecies, Shiras moose (Alces alces shirasi), using a combination of butorphanol (27.3 mg/mL), azaperone (9.1 mg/mL), and medetomidine (10.9 mg/mL). Ground and helicopter darting with fixed doses of 2 mL and 3 mL, respectively, safely immobilized 13 individuals in Wyoming, USA.

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