Fernandina (exitinct?) and Isabela in the Galápagos Islands of Ecuador.
 
Population
Estimated population is 80 - 120 (2010) and decreasing.
Status CR
Reason for decline is not known but predation and competition with invasive species seem to be the main threats.
For more information see BirdLife International Species Factsheet.
Food
Insects and their larvae, spiders and some vegetable matter.
Voice
A sequence of two-five 'tur' notes, each phrase being repeated up to three times.
Mangrove Finch (Camarhynchus heliobates) [XC18026]
by id from Playa Negra, Isabela, Galapagos, Ecuador (song)
Subspecies
No subspecies.
Recent molecular-genetic research suggests that the Galapagos group consisting of present genus and Certhidea, Platyspiza and Geospiza, known collectively as "Darwin's finches", is allied to the tanagers (Thraupidae), being closest to Coereba, Tiaris and several Caribbean genera.
Similar Species
Similar to Woodpecker Finch (Geospiza pallida), but has smaller bill, some faint streaking on underparts and is slightly browner. Woodpecker Finch (Geospiza pallida) are not known to get black hoods. Song is best way to differentiate them.
References
See References.