IUCN Conservation Status: Vulnerable
A small bird of the deciduous forest treetops, the sky-blue Cerulean Warbler is hard to see. It nests and forages higher in the canopy than most other warblers.
Buzzy notes ending in a higher pitched trill, "zee zee zee zizizizi eeet."
Cerulean Warbler: Story in BirdScope
eBird Occurrence Maps, Cerulean Warbler