LC
Black-collared Hawk Busarellus nigricollis



Taxonomy

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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

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

Red List history
Year Category Criteria
2020 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency Low
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 21,300,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 50000-499999 poor estimated 2016
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 - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 7.8 - - -

Population justification: The global population is estimated to number 50,000-499,999 mature individuals (Partners in Flight 2019).

Trend justification: The species is undergoing a moderate decline (Partners in Flight 2019), which is thought to be caused by the drainage of wetlands and urban development (Ferguson-Lees and Christie 2001).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant Yes
Belize N Extant Yes
Bolivia N Extant Yes
Brazil N Extant Yes
Colombia N Extant Yes
Costa Rica N Extant Yes
Ecuador N Extant Yes
El Salvador N Extant Yes
French Guiana N Extant Yes
Guatemala N Extant Yes
Guyana N Extant Yes
Honduras N Extant Yes
Mexico N Extant Yes
Nicaragua 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
Uruguay N Extant Yes
Venezuela N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Guyana Kwara / Aruka River
Colombia El Encanto de Guanapalo

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Aquatic & Marine Artificial/Aquatic - Irrigated Land (includes irrigation channels) suitable resident
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Swamp major resident
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Wetlands (inland) Seasonal/Intermittent Freshwater Lakes (over 8ha) suitable resident
Altitude 0 - 1500 m Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2021) Species factsheet: Busarellus nigricollis. Downloaded from http://www.birdlife.org on 27/11/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/11/2021.