Sitta canadensis. Maine (Lake Umbagog). copy 1 1871. May 30- June 10. Rather common but silent and retiring. copy 2 1872. June 2- 14. More numerous than last year but by no means abundant. Although all the species taken were adults their notes at this season are uttered in a high nasal tone not heard in autumn and are kept up incessantly like the cries of young birds. 1873. Sept. 22. They have become abundant within the last few days. copy 3 1879. June 23. Saw one catching flies precisely in the manner of Sphyrapicus. 1880. May 19. Set A-6. -- Incubated several days; nest in red maple stub over water; tree very rotten; height about twenty feet; hole on West side about two feet from top. A quantity of pitch, which my guide pronounced unmistakably spruce, about the entrance and inside its tunnel. Stub standing in five feet of water twenty yards from the shore, which was heavily forested with hemlock, spruce, and hard woods. Female sitting; she would come out when we rapped on the stub but almost immediately return to her eggs. While my guide was cutting off the stub about two feet below the hole, she repeatedly alighted at its entrance. " 20. Set B-7. -- Incubated about four days. ^Birch stub, in the woods bordering Cambridge River. Height twenty feet. Spruce gum thickly smeared about the entrance of the hole and over the whole face of the stub for a distance of six inches. Nest composed of the fine inner bark of the poplar. Our attention was drawn to this nest by hearing the birds uttering a peculiar, continuous whining noise. This was apparently the call of the male to his mate for she soon emerged from the hole answering him when both went off together. The stump was so rotten that we had to cut it down. The top broke off falling into a brush heap below, cracking some of the eggs, but breaking none of them. Shortly afterwards the female returned and in evident bewilderment hovered in the air over the spot where the tree had stood, vainly searching for it.