Morphnus guianensis 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Accipitriformes Accipitridae

Scientific Name: Morphnus guianensis
Species Authority: (Daudin, 1800)
Common Name(s):
English Crested Eagle, Guianan Crested Eagle
Spanish Aguila Crestada, Aguila Monera, Arpía Menor
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.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2015
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Benstead, P., Capper, D., Sharpe, C J, Symes, A. & Temple, H.
This species is rare throughout its vast range, and is thought to be declining moderately rapidly owing to habitat loss and hunting. For this reason it is classified as Near Threatened.

Previously published Red List assessments:
2008 Near Threatened (NT)
2004 Near Threatened (NT)
2000 Lower Risk/near threatened (LR/nt)
1994 Lower Risk/near threatened (LR/nt)
1988 Threatened (T)

Geographic Range [top]

Range Description: Morphnus guianensis is sparsely distributed throughout its extensive range from Guatemala through Belize, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela, Guyana, Suriname, French Guiana, Brazil, and east Andean Ecuador, Peru, Paraguay and Bolivia to north Argentina (Bierregaard 1994a, Bierregaard et al. 1995, Guyra Paraguay 2004).

Countries occurrence:
Argentina; Belize; Bolivia, Plurinational States of; Brazil; Colombia; Costa Rica; Ecuador; French Guiana; Guatemala; Guyana; Honduras; Mexico; Nicaragua; Panama; Paraguay; Peru; Suriname; Venezuela, Bolivarian Republic of
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 9190000
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Continuing decline in number of locations: Unknown
Extreme fluctuations in the number of locations: No
Upper elevation limit (metres): 1200
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population is estimated to number 1,000-10,000 individuals, roughly equating to 670-6,700 mature individuals.

Trend Justification:  This species is suspected to lose 29.8-47% of suitable habitat within its distribution over three generations (54 years) based on a model of Amazonian deforestation (Soares-Filho et al. 2006, Bird et al. 2011). However, the rate of loss outside Amazonia is likely to be lower (A. Lees in litt 2011), so the species is therefore suspected to decline by 25-30% over three generations.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 670-6700 Continuing decline of mature individuals: Unknown
Extreme fluctuations: No Population severely fragmented: No
Continuing decline in subpopulations: Unknown
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: No

Habitat and Ecology [top]

Habitat and Ecology: It occurs in lowland tropical and subtropical forest, including gallery forest in the south of its range, typically below 600 m but locally up to 1,200 m (Bierregaard 1994a, Parker et al. 1996).

Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 18
Movement patterns: Not a Migrant

Threats [top]

Major Threat(s): Its large size and low population densities make it particularly vulnerable to hunting (Bierregaard 1994a, Bierregaard et al. 1995). Deforestation is a severe problem, with many old records from now deforested parts of the Chocó region in north-west Colombia (Bierregaard 1994a, Bierregaard et al. 1995). Similarly extensive deforestation in parts of its Central American range suggest that local contractions of range or serious declines in population have already occurred (Bierregaard 1994a, Bierregaard et al. 1995). It presumably also suffers from competition with humans for prey (Galetti et al. 1997b).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CITES Appendix II.

Conservation Actions Proposed
Survey and attempt to estimate population density and global population. Organise educational campaigns to reduce hunting pressure. Study its ability to persist in fragmented and degraded habitat.

Citation: BirdLife International. 2015. Morphnus guianensis. The IUCN Red List of Threatened Species 2015: e.T22695991A85060710. . Downloaded on 29 November 2015.
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