VU
White-necked Hawk Buteogallus lacernulatus



Taxonomy

Taxonomic note
Buteogallus lacernulatus (del Hoyo and Collar 2014) was previously placed in the genus Leucopternis.

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.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. 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
- - C2a(i)

Red List history
Year Category Criteria
2016 Vulnerable C2a(i)
2012 Vulnerable C2a(i)
2008 Vulnerable C2a(i)
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,040,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 poor estimated 2000
Population trend Decreasing poor 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) 10-19 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2-100 - - -
Largest subpopulations - - -
Generation length (yrs) 7.6 - - -

Population justification: The population is estimated to number 2,500-9,999 mature individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.

Trend justification: A moderate and on-going population decline is suspected based on rates of habitat destruction and persecution.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Brazil N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Brazil Área de Proteção Ambiental de Guaratuba
Brazil Bertioga
Brazil Complexo Pedra Azul / Forno Grande
Brazil Engenho Coimbra (Usina Serra Grande)
Brazil Estação Ecológica de Juréia-Itatins
Brazil Fazenda Pindobas IV e Arredores
Brazil Guaraqueçaba / Jacupiranga / Cananéia
Brazil Ilha Grande
Brazil Ilhas Comprida e Cananéia
Brazil Itanhaém / Mongaguá
Brazil Itarana
Brazil Maciços da Tijuca e Pedra Branca
Brazil Mamanguape
Brazil Parque Estadual da Serra do Mar (entre Caraguatatuba e Picinguaba)
Brazil Parque Estadual da Serra do Mar (entre Santos e São Sebastião)
Brazil Parque Estadual da Serra do Papagaio
Brazil Parque Estadual do Desengano e Entorno
Brazil Parque Estadual do Rio Doce
Brazil Parque Nacional da Chapada Diamantina
Brazil Parque Nacional de Monte Pascoal
Brazil Região de Blumenau
Brazil Reserva Biológica de Duas Bocas
Brazil Reserva Biológica de Pedra Talhada
Brazil Reserva Biológica de Poço das Antas
Brazil Reserva Biológica União
Brazil Salto do Piraí
Brazil Santa Teresa
Brazil Serra da Bocaina / Paraty / Angra dos Reis
Brazil Serra da Cantareira
Brazil Serra do Teimoso
Brazil Serra do Tinguá
Brazil Serra dos Órgãos
Brazil Serras das Lontras e do Javi
Brazil Sooretama / Linhares

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Savanna Dry suitable resident
Altitude 0 - 2890 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Species mortality
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent

Recommended citation
BirdLife International (2017) Species factsheet: Buteogallus lacernulatus. Downloaded from http://www.birdlife.org on 17/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/10/2017.