Large-scale hybridization with G. magnirostris thought to have occurred on Santa Cruz. Hybridizes rarely with G. fuliginosa and with G. scandens, although on Isla Daphne Mayor N of Santa Cruz recent drought selected against birds with large bills and hybridization with immigrant fuliginosa has led to a further decrease in bill size to point where the two species appear to have fused#R. Monotypic.
Galapagos Is: islands of Pinta, Marchena, Fernandina, Isabela, Santiago, Rábida, Pinzón, Baltra, Santa Cruz, Santa Fe, Floreana and offshore islets, and San Cristóbal.
Food and feeding
Status and conservation
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