The Bay-breasted Warbler breeds across central and eastern Canada and extreme northern New England (Sibley 2014). In Montana, this species has several late summer and fall records over the past decade (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.
Direct Evidence of Breeding
Indirect Evidence of Breeding