Carolina Wren (Thryothorus ludovicianus)
An uncommon but much looked for species in this area right at the north of its geographic range. They arrived in the Montreal area 10-15 years ago and we have seen them most years, or heard them, since. Not locally widespread.
Call from dense vegetation in wooded areas, especially in forest ravines and neighborhoods. These birds love to move low through tangled understory; they frequent backyard brush piles and areas choked with vines and bushes.