The warbler-finches are a genus Certhidea of birds in the tanager family Thraupidae that are endemic to the Galápagos Islands. Together with related genera, they are collectively known as Darwin's finches.
Small, slender-billed Galápagos finch. Best identified by its thin bill, brownish-gray plumage, and the island on which it is seen. Male sometimes has a faint, buffy wash on throat and face. Occurs only on Floreana, Española, Santa Fé, San Cristóbal, Genovesa, Marchena, Pinta, Wolf, and Darwin.
The green warbler-finch exhibits monogamous behavior, often forming long-term bonds, and defends a small territory. It typically breeds during the hot wet season when bugs are plentiful.