Sayornis nigricans
– Least Concern
Taxonomy
|
Kingdom:
|
ANIMALIA
|
|
Phylum:
|
CHORDATA
|
|
Class:
|
AVES
|
|
Order:
|
PASSERIFORMES
|
|
Family:
|
TYRANNIDAE
|
|
Scientific Name:
|
Sayornis nigricans
|
|
Species Authority:
|
(Swainson, 1827)
|
|
Common Name/s:
|
|
Assessment Information
|
Red List Category & Criteria:
|
LC ver 3.1 (2001)
|
|
Year Assessed:
|
2004
|
|
Assessor/s:
|
BirdLife International
|
|
Evaluator/s:
|
Ekstrom, J. & Butchart, S. (BirdLife International Red List Authority)
|
|
Justification:
|
This species has a large range, with an estimated global extent of occurrence of 3,000,000 km². It has a large global population estimated to be 970,000 individuals (Rich et al. 2003). 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.
|
|
History:
|
| 1988 | - | Lower Risk/least concern (BirdLife International 2004) |
| 1994 | - | Lower Risk/least concern (BirdLife International 2004) |
| 2000 | - | Lower Risk/least concern (BirdLife International 2000) |
|
Geographic Range
|
Range Description:
|
This species has a large range, with an estimated global Extent of Occurrence of 3,000,000 km². It has a large global population estimated to be 970,000 individuals (Rich et al. 2003). 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.
|
|
Countries:
|
Native:
Argentina; Belize; Bolivia; Canada; Colombia; Costa Rica; Ecuador; El Salvador; Guatemala; Honduras; Mexico; Nicaragua; Panama; Peru; United States; Venezuela
|
Habitat and Ecology
|
System:
|
Terrestrial; Freshwater
|
