What’s that hopping around on the side of the tree? If it’s not a woodpecker or a nuthatch, it must be a brown creeper.
A bird’s behavior, along with its markings and song, offers important clues to identification. Perching on the trunk of a tree, rather than on a branch, is an unusual behavior that quickly narrows down the list of suspects. Some bird species perch this way in order to search for insects in the bark.
A second probably-new species was also observed in That Yard today, but has not yet been identified.