This is a new bird for me. I'm more familiar with the Red-breasted Nuthatch, and I was greatly surprised when two White-breasted Nuthatches arrived at the bird feeders several days ago. They were perched in the poplars nearby. I've seen one or the other every day since then.
larger than the Red-breasted Nuthatch (White-breasted Nuthatch - 15cm, Red-breasted Nuthatch - 11cm)
conservation - "Too much pruning or felling of dead wood can reduce the nesting opportunities for this species." (source: All About Birds)
White-breasted Nuthatches are very territorial and will drive out any other nuthatches. (It would be most unfortunate should this occur as the Red-breasted Nuthatches have inhabited these woods for many years. We will have to wait and see what happens.)
November 4, 2012 - The White-breasted Nuthatch is still coming to the feeders and usually makes his presence known by calling out before descending for a sunflower seed. I have seen nothing of the Red-breasted Nuthatch since the arrival of the bigger bird.