Turdus nigrescens
– Least Concern
Taxonomy
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Kingdom:
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ANIMALIA
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Phylum:
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CHORDATA
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Class:
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AVES
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Order:
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PASSERIFORMES
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Family:
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TURDIDAE
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Scientific Name:
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Turdus nigrescens
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Species Authority:
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Cabanis, 1861
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Common Name/s:
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Assessment Information
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Red List Category & Criteria:
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LC ver 3.1 (2001)
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Year Assessed:
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2004
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Assessor/s:
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BirdLife International
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Evaluator/s:
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Ekstrom, J. & Butchart, S. (BirdLife International Red List Authority)
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Justification:
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This species has an estimated global extent of occurrence of 2,100 km², but it is not believed to approach the thresholds for the range criterion of the IUCN Red List (i.e., extent of occurrence less than 20,000 km² in conjunction with both severe fragmentation and fluctuation/declines). The global population size has not been quantified, but it is believed to be large as the species is described as 'frequent' in at least parts of its range (Stotz et al. 1996). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern.
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History:
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| 1988 | - | Lower Risk/least concern (BirdLife International 2004) |
| 1994 | - | Lower Risk/least concern (BirdLife International 2004) |
| 2000 | - | Lower Risk/least concern (BirdLife International 2000) |
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Geographic Range
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Range Description:
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This species has an estimated global Extent of Occurrence of 2,100 km², but it is not believed to approach the thresholds for the range criterion of the IUCN Red List (i.e. Extent of Occurrence less than 20,000 km² in conjunction with both severe fragmentation and fluctuation/declines). The global population size has not been quantified, but it is believed to be large as the species is described as 'frequent' in at least parts of its range (Stotz et al. 1996). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e. declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern.
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Countries:
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Native:
Costa Rica; Panama
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Habitat and Ecology
