The Cerulean Warbler is threatened and moves steadily towards extinction. Formerly one of the most abundant breeding warblers in Ohio and the Mississippi River Valleys, its population plummeted in the 1900's. Cerulean Warbler is one of the species of highest concern in the eastern United States because of a small total population size and significant declines throughout its range. The main threat is from habitat degradation and forest fragmentation as the human population increases and land-uses change. Breeding habitat is degraded when mature deciduous forests, especially riparian forests, are lost; remaining forests are fragmented and isolated; less deciduous forests reach maturity because of shorter rotation periods and even-aged management; key tree species are lost because of disease. Winter habitat is being destroyed for the production of coffee beans and coca as the demand for coffee and illegal cocaine-based drugs grows. Rendered in Poser7 with no postwork. The Cerulean Warbler is one of 17 birds included in my upcoming "More Threatened, Endangered, Extinct" for the Songbird ReMix series.