White-breasted Nuthatch (Sitta carolinensis)
A small and stocky birds that is remarkably common in local gardens and especially nearby in the arboretum. They forage for insects on trunks and branches and often move head-first downwards. Seeds form a substantial part of its winter diet, as do acorns and hickory nuts stored in the fall. Old-growth woodland is preferred for breeding. They nest in holes in trees. Easily located by their very characteristic call that sounds like a nasally squeaky plastic toy.