The Brant breeds in the Canadian and Alaskan Arctic and winters along the Atlantic Coast from Massachusetts to North Carolina and along the Pacific Coast from Alaska to Baja California and northern Mexico (Lewis et al. 2013). In Montana, the Brant is an accidental spring and fall migrant (Montana Bird Distribution Committee 2012).
For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see Marks et al. 2016, Birds of Montana.
The species normally migrates along the west coast.