The golden eagle is one of the most widely distributed birds of prey on Earth and an apex aerial predator across the Northern Hemisphere. Renowned for its size, soaring flight, and the golden nape feathers that give the species its name, it occupies open and mountainous country from the Arctic tree line to the deserts of North Africa. Although the species remains numerous at the global scale, regional populations are unevenly distributed and several face mounting human-caused mortality from spent lead ammunition, power-line electrocution, wind-energy collisions, and illegal killing [Slabe et al. 2022; Mojica et al. 2018; Gedir et al. 2025; Whitfield et al. 2004]. This profile examines the biology of the golden eagle, the converging pressures on its populations, and the policy and engineering responses working to reduce avoidable losses.
Biology and Identification
The golden eagle is a large member of the family Accipitridae. Adults are dark brown overall with a distinctive golden-buff wash across the crown and nape, and immature birds show white patches at the base of the flight feathers and tail that diminish with age [BirdLife International 2021]. Females are substantially larger than males — a pattern of reversed size dimorphism common among raptors — with females averaging roughly 5.1 kg and males around 3.6 kg, and a wingspan spanning approximately 1.8 to 2.3 m [BirdLife International 2021].
Six subspecies are conventionally recognized across the species' range, differing in size and plumage tone, though genetic work has documented broad Holarctic homogeneity with a more distinct Mediterranean lineage [Nebel et al. 2015]. Golden eagles are powerful hunters of medium-sized mammals and birds — including hares, rabbits, marmots, and grouse — and will readily scavenge carrion, a behavior that exposes them to contaminants in carcasses and gut piles [Slabe et al. 2022]. Pairs are long-lived, typically maintain large territories, and build large stick nests, or eyries, on cliffs and in trees that may be reused and enlarged over many years [Watson 2010].
Habitat and Range
The golden eagle has a Holarctic distribution, occurring across North America, Europe, North Africa, and much of temperate and boreal Asia [BirdLife International 2021]. It favors open and semi-open landscapes — mountains, tundra, steppe, shrubland, and high desert — where updrafts aid soaring flight and prey is visible from the air. Northern populations are partially migratory, while many southern birds are resident on year-round territories [Watson 2010].
Population fortunes vary by region. Large populations in Asia and North America anchor the species' overall status, while several European national populations have experienced historical declines linked to persecution and habitat change [BirdLife International 2021; Whitfield et al. 2004]. In North America, long-term monitoring indicates that western U.S. populations have remained broadly stable in recent decades, even as human-caused mortality remains a management concern [Millsap et al. 2013; Millsap et al. 2022].
In accordance with NRWL sensitive-species policy, specific site locations, corridor routes, and seasonal movement details are not disclosed in this article.
Conservation Status
The golden eagle is listed as Least Concern on the IUCN Red List, assessed by BirdLife International, reflecting its very large global range and population [BirdLife International 2021]. This global classification, however, masks regional variation: some national and subregional populations are small, declining, or heavily affected by human-caused mortality, and the global listing should not be read as the absence of conservation need [Whitfield et al. 2004; Slabe et al. 2022]. The species is included on CITES Appendix II, which regulates international trade to ensure it does not threaten survival [CITES 2023].
In the United States, the golden eagle receives strong statutory protection. The Bald and Golden Eagle Protection Act (16 U.S.C. §§ 668–668c) — enacted in 1940 and amended in 1962 to add golden eagles — prohibits the take, possession, sale, or transport of eagles, their parts, nests, or eggs without a federal permit, and is administered by the U.S. Fish and Wildlife Service [USFWS 2023a]. Golden eagles are additionally protected under the Migratory Bird Treaty Act [USFWS 2023b].
Threats
Lead poisoning from spent ammunition is a pervasive, continent-scale threat. A study testing more than 1,200 bald and golden eagles across 38 U.S. states found chronic lead exposure in 47% of golden eagles and acute poisoning in 9%, with population modeling indicating that lead suppresses golden eagle population growth [Slabe et al. 2022]. Eagles ingest lead fragments when scavenging carcasses and gut piles left by hunters using lead ammunition.
Electrocution on overhead power infrastructure is a leading source of golden eagle mortality, particularly on poles with configurations that allow a perching or fledging eagle to bridge energized components [Lehman et al. 2007; Mojica et al. 2018]. Wind-energy collisions add a further, growing pressure: a Bayesian collision-risk analysis estimated that annual golden eagle turbine mortalities in the western United States more than doubled between 2013 and 2024, albeit with wide uncertainty [Gedir et al. 2025].
Illegal killing — including shooting, poisoning, and trapping — has historically suppressed populations in parts of the species' range. Modeling of Scottish populations demonstrated that persecution depresses occupancy and productivity below what habitat alone would support [Whitfield et al. 2004]. Secondary exposure to anticoagulant rodenticides has also been documented in golden eagles recovered from power-line and wind-turbine sites [Niedringhaus et al. 2022].
What Is Being Done
Power-pole retrofitting. Engineering standards for "avian-safe" poles — increasing the spacing between energized components and grounded hardware, and insulating exposed equipment — substantially reduce electrocution risk. Reviews conclude that mitigation strategized by region and targeted to the highest-risk poles can meaningfully lower golden eagle mortality [Mojica et al. 2018; Lehman et al. 2007].
Lead-ammunition transition. Because lead poisoning is driven by spent ammunition, voluntary and incentive-based programs encouraging hunters to switch to non-lead ammunition directly address the contaminant pathway identified in continental-scale exposure data [Slabe et al. 2022]. Reducing lead in the carrion that eagles scavenge is among the most tractable interventions for raptor recovery.
Eagle take permitting and monitoring. In the United States, the Fish and Wildlife Service administers a permit framework under the Bald and Golden Eagle Protection Act that authorizes limited, regulated take while requiring compensatory mitigation and monitoring designed to maintain stable breeding populations [USFWS 2023a]. Demographic studies of age-specific survival and allowable take inform how those permitting thresholds are set [Millsap et al. 2022], and long-term abundance monitoring tracks whether populations remain stable [Millsap et al. 2013].
How Readers Can Help
Choose non-lead ammunition. Hunters and land managers can reduce the single largest documented contaminant threat to eagles by using copper or other non-lead ammunition and removing or burying carcasses and gut piles [Slabe et al. 2022].
Report injured or dead eagles. In the United States, promptly reporting electrocuted, poisoned, or injured eagles to wildlife authorities contributes to the mortality data that guide power-line retrofitting and permitting decisions [Mojica et al. 2018].
Support science-based infrastructure standards. Public engagement in favor of avian-safe power-line design and well-sited wind energy helps reduce collision and electrocution losses documented in the literature [Lehman et al. 2007; Gedir et al. 2025].
Contribute verified observations. Logging golden eagle sightings through platforms such as eBird and iNaturalist supports the abundance and distribution datasets used in population monitoring and risk modeling [Gedir et al. 2025].
References
[BirdLife International 2021] BirdLife International. (2021). Aquila chrysaetos. The IUCN Red List of Threatened Species 2021: e.T22696060A202078899. https://dx.doi.org/10.2305/IUCN.UK.2021-3.RLTS.T22696060A202078899.en
[CITES 2023] CITES. (2023). Appendices I, II and III. Convention on International Trade in Endangered Species of Wild Fauna and Flora. https://cites.org/eng/app/appendices.php
[Gedir et al. 2025] Gedir, J.V., Gould, M.J., Millsap, B.A., Howell, P.E., Zimmerman, G.S., Bjerre, E.R. & White, H.B. (2025). Estimated golden eagle mortality from wind turbines in the western United States. Biological Conservation, 302, 110961. https://doi.org/10.1016/j.biocon.2024.110961
[Lehman et al. 2007] Lehman, R.N., Kennedy, P.L. & Savidge, J.A. (2007). The state of the art in raptor electrocution research: A global review. Biological Conservation, 136(2), 159–174. https://doi.org/10.1016/j.biocon.2006.09.015
[Millsap et al. 2013] Millsap, B.A., Zimmerman, G.S., Sauer, J.R., Nielson, R.M., Otto, M., Bjerre, E. & Murphy, R. (2013). Golden eagle population trends in the western United States: 1968–2010. The Journal of Wildlife Management, 77(7), 1436–1448. https://doi.org/10.1002/jwmg.588
[Millsap et al. 2022] Millsap, B.A., Grams, K.A., Slabe, V.A., Diffendorfer, J.E., Bjerre, E.R., Wiens, J.D. & Zimmerman, G.S. (2022). Age-specific survival rates, causes of death, and allowable take of golden eagles in the western United States. Ecological Applications, 32(3), e2544. https://doi.org/10.1002/eap.2544
[Mojica et al. 2018] Mojica, E.K., Dwyer, J.F., Harness, R.E., Williams, G.E. & Woodbridge, B. (2018). Review and synthesis of research investigating golden eagle electrocutions. The Journal of Wildlife Management, 82(3), 495–506. https://doi.org/10.1002/jwmg.21412
[Nebel et al. 2015] Nebel, C., Gamauf, A., Haring, E., Segelbacher, G., Villers, A. & Zachos, F.E. (2015). Mitochondrial DNA analysis reveals Holarctic homogeneity and a distinct Mediterranean lineage in the golden eagle (Aquila chrysaetos). Biological Journal of the Linnean Society, 116(2), 328–340. https://doi.org/10.1111/bij.12583
[Niedringhaus et al. 2022] Niedringhaus, K.D., Nemeth, N.M., Gibbs, S., Zimmerman, J., Shender, L., Slankard, K., Fenton, H., Charlie, B., Dalton, M.F., Elsmo, E.J., Poppenga, R., Millsap, B. & Ruder, M.G. (2022). Anticoagulant exposure in golden eagle (Aquila chrysaetos) power line electrocution and wind turbine mortalities. Journal of Wildlife Diseases, 58(2), 348–353. https://doi.org/10.7589/JWD-D-21-00144
[Slabe et al. 2022] Slabe, V.A., Anderson, J.T., Millsap, B.A., Cooper, J.L., Harmata, A.R., Restani, M., Crandall, R.H., Bodenstein, B., Bloom, P.H., Booms, T., Buchweitz, J., Culver, R., Dickerson, K., Domenech, R., Dominguez-Villegas, E., Driscoll, D., Smith, B.W., Lockhart, M.J., McRuer, D., Miller, T.A., Ortiz, P.A., Rogers, K., Schwarz, M., Turley, N., Woodbridge, B., Finkelstein, M.E., Triana, C.A., DeSorbo, C.R. & Katzner, T.E. (2022). Demographic implications of lead poisoning for eagles across North America. Science, 375(6582), 779–782. https://doi.org/10.1126/science.abj3068
[USFWS 2023a] U.S. Fish & Wildlife Service. (2023). Bald and Golden Eagle Protection Act (16 U.S.C. §§ 668–668c). https://www.fws.gov/law/bald-and-golden-eagle-protection-act
[USFWS 2023b] U.S. Fish & Wildlife Service. (2023). Migratory Bird Treaty Act of 1918. https://www.fws.gov/law/migratory-bird-treaty-act-1918
[Watson 2010] Watson, J. (2010). The Golden Eagle (2nd ed.). T. & A.D. Poyser, London.
[Whitfield et al. 2004] Whitfield, D.P., Fielding, A.H., McLeod, D.R.A. & Haworth, P.F. (2004). Modelling the effects of persecution on the population dynamics of golden eagles in Scotland. Biological Conservation, 119(3), 319–333. https://doi.org/10.1016/j.biocon.2003.11.014