The green warbler-finch (Certhidea olivacea) is a species of bird, one of Darwin's finches in the tanager family Thraupidae. Sometimes classified in the family Emberizidae, more recent studies have shown it to belong in the tanager family.
When Darwin collected it in 1835 during the Beagle survey expedition he mistakenly thought it was a wren, but on return to England he was informed in March 1837 by the ornithologist John Gould that the bird was in the group of finches.
It is endemic to the Galápagos Islands, Ecuador. This species is closely related to the grey warbler-finch, and were formerly considered conspecfic, but both species differ in appearance, distribution, habitat, and song. The green warbler-finch consists of only one subspecies, the nominate olivacea, from Santiago, Rábida, Pinzón, Isabela, Fernandina, and Santa Cruz. Green warbler-finches have a greenish coloration to blend into their lusher semihumid forest habitats, as well as distinctive reddish throat patches on breeding males.
- BirdLife International (2012). "Certhidea olivacea". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. Retrieved 16 July 2012.
- Sulloway, Frank J. (1982). "Darwin and His Finches: The Evolution of a Legend" (PDF). Journal of the History of Biology. 15 (1): 1–53. doi:10.1007/BF00132004. Retrieved 2008-12-09.
- South American Classification Committee (September 1, 2011). "Proposal (#367) to South American Classification Committee – Split the Warbler Finches: Certhidea fusca from Certhidea olivacea.". Archived from the original on January 31, 2010. Retrieved November 10, 2009.
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