LC
Lesser Rhea Rhea pennata



Taxonomy

Taxonomic note

Rhea pennata and R. tarapacensis (del Hoyo and Collar 2014) were previously lumped as R. pennata 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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

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

Red List history
Year Category Criteria
2018 Least Concern
2016 Least Concern
2014 Least Concern A2cd+3cd+4cd
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 828,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals not applicable not applicable 0
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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 11 - - -

Population justification: The global population size has not been quantified, but this species is described as 'uncommon' (Stotz et al. 1996).

Trend justification: The species is suspected to have undergone declines owing to the effects of hunting and egg-collection, with overgrazing perhaps being less significant but still having a negative impact.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Argentina Valle del Río Collón Curá
Argentina San Antonio Oeste
Argentina Nahuel Huapi National Park and Reserve
Argentina Extensión Límite Este y Sur del Parque Nacional Nahuel Huapi
Argentina Meseta de Somuncura Provincial Natural Protected Area
Argentina Sistema Península de Valdés
Argentina Punta Tombo
Argentina Bahía Camarones y Norte del Golfo San Jorge
Argentina Cabo Vírgenes - Punta Dungeness
Argentina Monte León
Argentina Desembocadura del Río Gallegos
Argentina Estuario del Río Coyle
Argentina Meseta Lago Strobel
Argentina Reserva Provincial Laguna de Llancanelo
Argentina Reserva Provincial El Payén
Argentina Parque Nacional Laguna Blanca
Argentina Area Natural Protegida Auca Mahuida
Argentina Paso de los Indios
Argentina Area Natural Protegida El Mangrullo
Argentina La Angostura y Alto Río Chico
Argentina Monumento Natural Bosques Petrificados y Estancia El Cuadro
Argentina Parque Nacional Perito Moreno y Reserva Provincial San Lorenzo
Argentina Meseta Lago Buenos Aires
Argentina El Zurdo
Argentina Laguna Nimez y costa aledaña del Lago Argentino
Argentina Meseta del Asador (o Aguila)
Argentina Parque Nacional Los Glaciares y adyacencias (Estancias El Sosiego, La Soledad y Anita)
Argentina Estancia El Cóndor
Chile Coyahique Alto-Coite
Argentina Península y Bahía de San Julián
Chile Parque Nacional Torres del Paine
Chile Marisma Buque Quemado
Chile Pingüinera del Seno Otway
Chile Chacabuco Valley and Baker River Entrance
Argentina Reserva Natural Villavicencio
Chile Parque Nacional Pali Aike

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Temperate suitable resident
Shrubland Subtropical/Tropical Dry suitable resident
Wetlands (inland) Alpine Wetlands (includes temporary waters from snowmelt) suitable resident
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands marginal resident
Wetlands (inland) Permanent Saline, Brackish or Alkaline Lakes marginal resident
Altitude 0 - 1500 m Occasional altitudinal limits (max) 2000 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - - Non-trivial Recent
Food - human - - Non-trivial Recent
Handicrafts, jewellery, etc. - - - International Non-trivial Recent
Handicrafts, jewellery, etc. - - International Non-trivial Recent
Pets/display animals, horticulture - - - International Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Rhea pennata. Downloaded from http://www.birdlife.org on 03/07/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/07/2022.