Certhidea fusca ridgwayi

One of the smallest finches. A sister species of the Green Warbler Finch (Certhidea olivacea) (Lamichhaney et al., 2015), very similar to it, and they do not have geographic overlap. There is no distribution overlap with the Green Warbler Finch, so its identification is very easy, both by vocalization (which differs greatly from the other finches it inhabits with) and by morphology, as it is the only finch with such a thin beak where it lives. It prefers arid areas or shrubs and is locally abundant. It has seven subspecies distributed across different islands.

Geographic Distribution: C. f. becki in Darwin and Wolf; C. f. mentalis in Genovesa; C. f. fusca in Pinta and Marchena; C. f. luteola in San Cristóbal; C. f. bifasciata in Santa Fé; C. f. cinerascens in Española; C. f. ridgwayi in Floreana (Jaramillo, 2020a), although it is mentioned as extinct in Floreana (Fessl et al., 2017).

Description extracted from: La Grotteria (2023).

REFERENCES

La Grotteria, J. 2023. Identificación, comentarios y registros personales de pinzones de Darwin. Referencia Orientativa.