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[Creeperopolis]

The elfin woods warbler (Setophaga angelae) is a species of bird endemic to Puerto Rico, where it is local and uncommon. Discovered in 1968 and described in 1972, it is the most recently described New World warbler (family Parulidae).

The species name, angelae, is a tribute to Angela Kepler, one of its discoverers. These birds are insectivores, as they feed by gleaning small insects off the habitat 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.