Forests, Fire, and Ridgelines

Cerulean Warbler Habitat Needs

Across the state, the Cerulean Warbler prefers large blocks of mature, deciduous forest. However, they appear to key in on disturbance within these large forest blocks for nesting. Historically, these disturbances, or breaks in the canopy, were likely caused by insect outbreaks, wind storms, and other natural events. Perhaps most notably, fire likely played an important role in creating and maintaining these patchy openings as well.

Ceruleans also seem to key in on topographic features when choosing nest sites. Ridgelines are often chosen in Indiana, which is consistent with nest locations from other states (Weakland and Wood 2005). Tree species also seem to matter, and white oak, chestnut oak, and several species of hickories are common components of breeding habitat. The largest trees (>16 inches in diameter) are often chosen as nest locations (Wood, P.B. et al, 2013).