Bent, (1948) described this little nuthatch as: ‘a happy, jolly little bird, surprisingly quick and agile’. Breeding populations are found throughout the boreal and mixed forests where they forage on small branches, twigs and needles. They are able to respond to spruce budworm (Choristoneura fumiferana) outbreaks that recurrently defoliate softwood stands. An exclusive behavior of the Red-breasted Nuthatch is the smearing of pitch or resin around the nest entrance to defend the excavated nest hole from small rodents or insects. Mean clutches of 5-6 eggs are reported from the end of April to the end of June and are incubated for 12 days. The Red-breasted Nuthatch is the only true but irregular migratory nuthatch. Even if this tree climber is considered as the most well-liked nuthatch species of North America, its social organization is still not well-known, particularly on its breeding grounds.