Abstract Avian responses to forest edges have received much attention in recent years, particularly because of the potential effects of deforestation on the quality of remaining forest patches. However, individual birds' responses to forest edges are more often inferred than observed, and most studies of space use emphasize territory placement, with little or no detail on within-territory movements. Thus, our understanding of the effects of edges on movements of forest birds remains limited. We recorded movements of 85 winter flocks of the little-known Boreal Chickadee (Poecile hudsonica), in a 66-km2 boreal forest harvested for timber near Quebec City, Quebec. From January to March 2004 and 2005, we followed flocks on snowshoes and recorded their trajectory in real time using a handheld global positioning system (GPS) receiver. Boreal Chickadee flocks showed no response to forest edges when using mature forest stands. However, flocks mostly used edges of regenerating forest habitat (4–7 m high). Inside r...