Like several other warblers, the Kentucky Warbler is a forest species that typically inhabits fairly large tracts of deciduous forest. Within that habitat, the Kentucky Warbler usually is found on or near the forest floor. Hence, a good thick understory is important to its survival. In Iowa, it is mainly found in eastern and southern parts of the state and nowhere is it very common. It is a neotropical migrant, spending its winters in Central America and northern South America. Kentucky Warbler populations have shown some evidence of declining, especially in the northern portions of its range. Although specific reasons for this decline are still being studied, besides habitat loss, issues such as forest fragmentation, cowbird parasitism, and degradation of the understory by grazing of domestic livestock have all been suggested as possible problems.
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indicates a designated IBA.