Galapagos Species Checklist


Certhidea fusca

Sclater & Salvin, 1870

Domain Eukaryota
Kingdom Animalia
Division Chordata
Class Aves
Order Passeriformes
Family Thraupidae
Genus Certhidea

Certhidea fusca  Sclater & Salvin, 1870

 

English common name: Gray Warbler Finch

Spanish common name: Pinzón cantor gris

Taxonomic comments: This species is closely related to the Green Warbler Finch, and were formerly considered conspecific, but both species differed in appearance, distribution, habitat, and song. Syn.: Certhidea olivacea Gould, 1837.
A recent genetic study has shown a single colonization event about 850 000 yrs ago from southern central America rather than continental Ecuador.

Name status: Accepted name; taxon occurs in Galapagos.

Description: The smallest of all Darwin finches, about 8 grams, and the species with the thinnest beak.

Threats
As for other finches, threats are probably now mainly introduced diseases.

Last updated: 28 Aug 2017

Origin

  • In
    Introduced
  • Na
    Native

  • En
    Endemic

    Taxon occurs only in Galapagos.

  • Hy
    Hypothetical
  • Id
    Indigenous
  • Mi
    Migrant
  • EnQ
    Questionable Endemic
  • Re
    Resident
  • Va
    Vagrant

IUCN Status

Not Evaluated - Not yet been evaluated against the criteria.


The IUCN Red List assessments presented here may deviate from the global IUCN listings for the following reasons:

  • for well-known species groups, such as vascular plants or vertebrates, updates proposed to the IUCN are shown, rather than the outdated, but currently-used status;
  • for poorly-known species groups, such as lichenized fungi, a general assessment is not currently possible, therefore the list presented here is the regional IUCN Red List for the Galapagos Archipelago.

Distribution

C. fusca is found on the smaller islands in the north, east and south of the archipelago, practically spanning the entire length of the archipelago. Present on Darwin, Wolf, Española, Santa Fe, San Cristobal, Pinta, Floreana.

Preference for altitude zone in Galapagos: Dry zone-transition zone.

General Ecology

Habitat preferences: Found in drier habitats than C. olivacea, but also at moderate to high elevation on San Cristóbal.

Substrate or host preferences: Forages in trees and shrubs, searching foliage leaf clusters and epiphytes and probing mosses (especially during the dry season), for arthropods.

Trophic role: Carnivorous (feeding on animals).

Feeding type: Insectivorous (feeding on insects).

Reproductive biology: Male displays in front of a dome shape nest. Once chosen, the pair either use this nest or build a new one. Only females incubate (two to three eggs), both feed the chicks. Fledglings stay for up to 6 weeks with a parent, either with the male while the female starts a new clutch, or, one with the female and the other with the male.

Literature

  • Castro, I., Phillips, A. (1996) A Guide to the Birds of the Galapagos Islands. Christopher Helm Publishers Ltd., London.
  • Farrington, H., Petren, K. (2011) A century of genetic change and metapopulation dynamics in the Galápagos warbler finches (Certhidea). Evolution 65:3148-3161.
  • Farrington, H., Lawson, L., Clark, C. & Petren, K. (2014) The evolutionary history of Darwin's finches: speciation, gene flow, and introgression in a fragmented landscape. Evolution doi 10.1111/evo.12484.
  • Grant, B.R., Grant, P.R. (2002) Lack of premating isolation at the base of a phylogenic tree. The American Naturalist 160:1-19.
  • Grant, P.R., Grant, B., Petren, K. & Keller, L (2005) Extinction behind our backs: the possible fate of one of the Darwin's finch species on Isla Floreana, Galápagos. Biological Conservation 122:499-503.
  • Guerrero, A., Tye, A. (2009) Darwin's Finches as seed predators and dispersers. The Wilson Journal Of Ornithology 121 (4):752-764, 2009
  • Harris, M.P. (1973) The Galápagos avifauna. Condor 75(3): 265-278.
  • IUCN (2017) The IUCN Red List of Threatened Species Version 2016-3. . Downloaded on 03 February 2017.
  • IUCN (2015) The IUCN Red List of Threatened Species. Version 2015-4. . Downloaded on 20 November 2015.
  • Lamichhaney, S., Berglund, J., Sällman Almén, M., Maqbool, K., Grabherr, M., Martinez-Barrio, A., Promerova, M., Rubin, C.J., Wang, C., Zamani, N., Grant, B.R., Grant, P.R., Webster, M.T., Andersson, L. (2015) Evolution of Darwin’s finches and their beaks revealed by genome sequencing Nature 518: 371-386. doi:10.1038/nature14181
  • Petren, K., Grant, B. & Grant, P. (1999) A phylogeny of Darwin's finches based on microsatellite DNA length variation. Proceedings of the Royal Society of London Series B-Biological Sciences 266:321-329.
  • Petren, K., Grant, P., Grant, B. & Keller, L. (2005) Comparative landscape genetics and the adaptive radiation of Darwin’s finches: the role of peripheral isolation. Molecular Ecology 14:2943-2957.
  • Remsen, J.V, Cadena, C. D., Jaramillo, A., Nores, M., Pacheco, J. F., Pérez-Emán, J., Robbins, M. B., Stiles, F. G., Stotz, D. F., and Zimmer, K. J. (2012) A classification of the bird species of South America. American Ornithologists' Union http://www.museum.lsu.edu/~Remsen/SACCBaseline.html
  • Remsen, J.V., Areta, J.I.Jr., Cadena, C.D., Claramunt, S., Jaramillo, A., Pacheco, J.F., Pérez-Emán, J., Robbins, M.B., Stiles, F.G., Stotz, D.F., Zimmer, K. J. (2016) A Classification of the Bird Species of South America. South American Classification Committee. American Ornithologists' Union http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm
  • Salvin, O. (1876) On the avifauna of the Galápagos Archipelago. Transactions of the Zoological Society of London 9: 447-510.
  • Swarth, H.S. (1931) The Avifauna of the Galapagos Islands. Occ. Pap. Calif. Acad. Sci. 18: 1-299.
  • Tonnis, B., Grant, P., Grant, B. & Petren, K. (2005) Habitat selection and ecological speciation in Galápagos warbler finches (Certhidea olivacea and Certhidea fusca). Proceedings of the Royal Society of London Series B-Biological Sciences 272:819-826.
  • Wiedenfeld, D.A. (2006) Aves, the Galapagos Islands, Ecuador. Check List 2006 2(2): 1-27.