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The Warbler Finch (Certhidea olivacea) is the only member of the genus Certhidea and one of Darwin's finches, the group of 14 or 15 passerine birds first collected by Charles Darwin on the Galápagos Islands during the second voyage of the Beagle. Though sometimes classified in the family Emberizidae, more recent studies have shown it to belong in the tanager family, Thraupidae. Darwin had mistakenly thought it was a wren, but, on return to England, was informed in March 1837 by the ornithologist John Gould that the bird belonged to the group of finches.