Dendroica caerulescens. Lake Umbagog. Copy 8 1898. Dendroica caerulescens has two notes which closely re- Sept.1. semble those of the Junco. One is a soft tsup, the other a call Notes. tittering flight call (ti-ti-ti-ti-ti) exceedingly like that made by the Junco when first taking flight but less loud. These Warblers are exceptionally numerous here this autumn. I saw at least a dozen this morning. They are often seen in the tops of tall trees at this season.