Pinaroloxias inornata 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Thraupidae

Scientific Name: Pinaroloxias inornata (Gould, 1843)
Common Name(s):
English Cocos Finch, Cocos Island Finch
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Identification information: 12 cm. Dark, slender-billed and chunky finch. Male black. Female blackish-brown above, indistinctly streaked olive-brown. Sometimes extensively buffy forehead, lores and eyebrow. Buffish wing-bars. Buff underparts streaked black, paler on belly. Immature as female, but with yellow bill. Voice Prolonged and buzzy song, rising at the end, and often preceded by piercing, metallic note. Calls include burry and rough djrr, and whistled tyew.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Isherwood, I., Mahood, S., Pople, R., Sharpe, C.J.
Although its high tolerance of degraded habitats suggests that this species is unaffected by the impact of introduced herbivores on forested areas, it is listed as Vulnerable because it has a very small range and is thus susceptible to chance catastrophes.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Pinaroloxias inornata is endemic to Cocos Island, c.500 km from Costa Rica, where it is the most common landbird (Slud 1967). It is abundant in the lowlands and sparser at higher altitude.

Countries occurrence:
Costa Rica
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:30
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:1Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):570
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population size is preliminarily estimated to fall into the band 10,000-19,999 individuals. This equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.

Trend Justification:  There do not appear to be any significant threats to this species, so its population is suspected to be stable.
Current Population Trend:Stable
Additional data:
Number of mature individuals:6000-15000Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:1Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:Yes
No. of individuals in largest subpopulation:100

Habitat and Ecology [top]

Habitat and Ecology:It occupies every available habitat on the island, including Hibiscus thickets along coasts, woodland, open country and closed-canopy forest (Smith and Sweatman 1976, Sherry 1985, Stiles and Skutch 1989), and is common in disturbed vegetation (Slud 1967). It is a generalist (Smith and Sweatman 1976), but individual birds usually specialise in one or a few of the various foraging techniques employed by the species as a whole (Stiles and Skutch 1989). Nesting occurs throughout the year, but is mostly concentrated in January-May (Stiles and Skutch 1989).

Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):3.8
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): Rats and cats are potential predators, and grazing by feral deer, pigs and goats degrades natural habitats on the island. There is also low-level disturbance from increasing tourism. However, none of these appears to have adverse affects.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
Cocos Island is a national park. No targeted actions are known.

Conservation Actions Proposed
Assess the size of the population. Study the impact of introduced mammals, and factors that may affect the species's abundance.

Citation: BirdLife International. 2016. Pinaroloxias inornata. The IUCN Red List of Threatened Species 2016: e.T22723792A94833441. . Downloaded on 19 June 2018.
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