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Elfin woods warbler
The elfin woods warbler (''Setophaga angelae'') is a bird endemic to the Caribbean island of Puerto Rico where it is a local and uncommon species. Discovered in 1968 and described in 1972, it is the most recently described species of New World warbler (Parulidae family). The species name, ''angelae'', is a tribute to Angela Kepler, one of its discoverers. An insectivore, it feeds by gleaning small insects off leaves.
Due to its small populations and restricted habitats, conservation efforts were begun in 1982 to protect this species but, as of 2005, the warbler was still in need of protection. The species is not in immediate danger as the majority of its habitat is protected forest, but introduced species, such as rats and small Asian mongooses, habitat reduction, and natural disasters represent potential threats to the population.
==Discovery and naming==
The elfin woods warbler is one of many species in the genus ''Setophaga'' of the New World warbler family Parulidae. It was first observed in 1968 by Cameron and Angela Kepler while they were conducting observations on two Puerto Rican endemic birds, the Puerto Rican amazon and the Puerto Rican tody. On May 18, 1971, a specimen was captured in El Yunque National Forest, which at the time was believed to be its only habitat. A year later Kepler and Parkes described and named the species making it the most recent warbler of the genus ''Setophaga'' discovered in the New World. Also, it is the first species described in the Caribbean since 1927 and the first Puerto Rican species described in the 20th century. The species name, ''angelae'', is a tribute to Angela Kepler. Elfin-woods warbler is an alternative spelling, and ''Reinita de Bosque Enano'' is the Spanish name. The species was initially placed in the genus ''Dendroica'' but in 2011 the American Ornithologists' Union reorganized the classification of the Parulidae family and transferred species in the ''Dendroica'' genus into ''Setophaga''. This revised classification was adopted by the International Ornithologists’ Union.〔(【引用サイトリンク】url=http://www.worldbirdnames.org/bow/warblers/ )〕
A phylogenetic analysis using mitochondrial DNA sequences from New World warblers has shown that within the genus ''Setophaga'' the elfin woods warbler is most closely related to the arrowhead warbler, a species which is endemic to Jamaica and the plumbeous warbler which is endemic to the islands of Dominica and Saint Lucia.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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