Scientific name: Dendroica cerulea
Declines in the population of Cerulean Warblers in many parts of its range have made the species a focus of much survey and monitoring work. Cerulean Warblers are susceptible to forest fragmentation, although they will occupy second growth in addition to mature forest.
Male Cerulean Warblers typically arrive on their breeding grounds about a week before females. While males appear to help the female select a nest site, it is the female alone that builds the nest.