White-breasted nuthatch
Not much selection these days, same dozen or so species.
Sitta carolinensis
In winter, White-breasted Nuthatches join foraging flocks led by chickadees or titmice, perhaps partly because it makes food easier to find and partly because more birds can keep an eye out for predators. One study found that when titmice were removed from a flock, nuthatches were more wary and less willing to visit exposed bird feeders.
Source - Cornell Lab of Ornithology.
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