Anadón-Irizarry, Verónica

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    Distribution, habitat occupancy and population density of the Elfin-woods Warbler (Dendroica angelae) in Puerto Rico
    (2006) Anadón-Irizarry, Verónica; Delannoy, Carlos A.; College of Arts and Sciences - Sciences; Bird-Picó, Fernando J.; Lewis, Allen R.; Department of Biology; Williams, Ernest H.
    The Elfin-woods Warbler (Dendroica angelae) is a threatened species endemic to montane forests in Puerto Rico. The objectives of this study were to determine the current geographical distribution, spatial distribution pattern, habitat occupancy and abundance, and population density of the Elfin-woods Warbler (EWWA). Surveys were conducted in montane forests in 2003-2004. Survey routes 0.8 to 3km in length with point-count stations 200m apart were established in sample habitats 200 to 1,030m in elevation. EWWA distribution was limited to the Maricao State Forest and the Caribbean National Forest. EWWA in the Maricao State Forest was more abundant in Podocarpus with a positive correlation between EWWA mean number and elevation. Most EWWA in the Caribbean National Forest were located in Palo Colorado and Dwarf Forest with no elevation significance. In conclusion, the EWWA has disappeared from former range along the Cordillera Central and Sierra de Cayey. Current distribution is limited to the Caribbean National Forest (eastern Puerto Rico) and Maricao State Forest (western Puerto Rico), and extant populations occur at low densities. It is recommended that the species be reclassified as an endangered species under the Endangered Species Act and the International Union for the Conservation of Nature.