Pygmy Nuthatch mates for life and the pair pretty much stays together all year long. When they nest, the siblings and in-laws of the nesting pair hang around and help them with chores like gathering food for the youngsters. Pygmy Nuthatch finds someplace that he likes and stays close all year long - they don't migrate unless food sources are depleted. Dendrologists in the Cascade Mountains see Pygmy Nuthatch as an indicator species. If the little ones are happy, the giant Ponderosa pine forest is probably in good shape.
Like Chickadee, on a chilly night, Nuthatch can let his body temperature drop to cope with the cold. If it gets really frigid, he will huddle together with his buddies for warmth. We don't know for sure, but doubt that it gets cold enough here for him to go that far, but who knows? On a really nippy evening we are sitting by the fire, not out bird watching.