LC
Grey-lined Hawk Buteo nitidus



Taxonomy

Taxonomic note

Buteo nitidus and B. plagiatus (del Hoyo and Collar 2014) were previously lumped as B. nitidus following AOU (2006), the gender agreement of which follows David and Gosselin (2002a), and before then were placed in the genus Asturina following AOU (1998), and before then were split as A. nitida and A. plagiata following Sibley and Monroe (1990, 1993).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2014 Least Concern
Species attributes

Migratory status full migrant Forest dependency Medium
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 15,500,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 0
Population trend Decreasing suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 9.3 - - -

Population justification: Described in parts of very large range as locally common and tolerant of open and secondary forest; typically absent from closed humid forest. Population likely to be large (Ferguson-Lees & Christie 2001).

Trend justification: This species is suspected to lose 21.3-28.7% of suitable habitat within its distribution over three generations (22 years) based on a model of Amazonian deforestation (Soares-Filho et al. 2006, Bird et al. 2011). It is suspected to decline by <25% over three generations as it is not highly forest-dependent, favouring open country and forest edges.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant Yes
Bolivia N Extant Yes
Brazil N Extant Yes
Colombia N Extant Yes
Costa Rica N Extant Yes
Ecuador N Extant Yes
French Guiana N Extant Yes
Guyana N Extant Yes
Panama N Extant Yes
Paraguay N Extant Yes
Peru N Extant Yes
Suriname N Extant Yes
Trinidad and Tobago N Extant Yes
Venezuela N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Subtropical/Tropical Dry suitable breeding
Forest Subtropical/Tropical Moist Lowland suitable breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Savanna Dry suitable breeding
Savanna Dry suitable non-breeding
Savanna Moist suitable non-breeding
Savanna Moist suitable breeding
Altitude 0 - 800 m Occasional altitudinal limits (max) 1300 m

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Other (free text) - - - Non-trivial Recent
Pets/display animals, horticulture - - - Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Buteo nitidus. Downloaded from http://www.birdlife.org on 16/10/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/10/2019.