Reproducción exitosa de una pareja de Águila Coronada o Águila del Chaco (Buteogallus coronatus) en la provincia de Santiago del Estero, Argentina

Diego Gallego-García; Maximiliano Churruarin; Sergi Gómez-Espí; José H. Sarasola

doi:10.56178/na.vi70.1076

Articles Published 13 August 2025 https://doi.org/10.56178/na.vi70.1076

Successful breeding of a pair of Chaco Eagle (Buteogallus coronatus) in Santiago del Estero province, Argentina

conservation Chaco eagle (Buteogallus coronatus)Crowned-solitary Eagle Dry Chaco endangered nest reproductive territory

Diego Gallego-García Centro para el Estudio y Conservación de las Aves Rapaces en Argentina (CECARA), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Avda. Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina | Instituto de las Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Calle Rivadavia 236, 6300 Santa Rosa, La Pampa, Argentina

Maximiliano Churruarin Fauna Tostado. Calle Presidente Perón 2405. 3060 Tostado, Santa Fe, Argentina

Sergi Gómez-Espí Centro para el Estudio y Conservación de las Aves Rapaces en Argentina (CECARA), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Avda. Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina | Instituto de las Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Calle Rivadavia 236, 6300 Santa Rosa, La Pampa, Argentina

José H. Sarasola Centro para el Estudio y Conservación de las Aves Rapaces en Argentina (CECARA), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Avda. Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina | Instituto de las Ciencias de la Tierra y Ambientales de La Pampa (INCITAP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Calle Rivadavia 236, 6300 Santa Rosa, La Pampa, Argentina

Abstract

The Crowned-solitary eagle, or Chaco eagle (Buteogallus coronatus) is one of the most endangered raptor species in the Neotropics. Argentina, along with Brazil, Paraguay and Bolivia, is one of the countries where this endangered species is distributed. However, there are few provinces in Argentina where the successful reproduction of the species has been confirmed. The reports are concentrated in the provinces of La Pampa, Mendoza, Santa Fe and San Luis, with an anecdotal record in Córdoba. In this note, we report the first successful reproduction of the Chaco eagle in the province of Santiago del Estero. This finding highlights the Chaco Seco ecoregion as one of the most important environments for the species, and emphasizes the need to continue the conservation programs and monitoring of breeding populations of the species in this biome.

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References

Aparicio G, Lizzi J, Maturo H, Antoniazzi L (2008) La Reserva Natural El Mangrullo y su aporte para la conservación del Gran Chaco Americano. Informe técnico de la Fundación Hábitat y Desarrollo. Santa Fe, Argentina, pp 95
Barbar F, Capdevielle A, Encabo M (2016) Direct persecution of Crowned Eagles (Buteogallus coronatus) in Argentina: a new call for their conservation. Journal of Raptor Research 50: 115-120. https://doi.org/10.3356/rapt-50-01-115-120.1
Bellocq MI, Ramírez-Llorens P, Filloy J (2002) Recent records of crowned eagles (Harpyhaliaetus coronatus) from Argentina, 1981-2000. Journal of Raptor Research 36: 206-212
BirdLife International (2024) Buteogallus coronatus. The IUCN Red List of Threatened Species 2024: e.T22695855A246532305. https://dx.doi.org/10.2305/IUCN.UK.2024-2.RLTS.T22695855A246532305.en. Accedido el 5/2/2025
Burr ZM, Varpe Ø, Anker-Nilssen T, Erikstad KE, Descamps S, Barrett RT, Bech C, Christensen-Dalsgaard S, Lorentsen S-H, Moe B, Reiertsen TR, Strøm H (2016) Later at higher latitudes: Large-scale variability in seabird breeding timing and synchronicity. Ecosphere 7: e01283
Coria OR, Gómez N, Heredia J, Quiroga O, Carrizo DA, Ruiz P, Herrera M, Rojas LM (2013) Nuevos aportes sobre la avifauna de la provincia de Santiago del Estero, Argentina. Nuestras Aves 58: 68-72. https://doi.org/10.56178/na.vi58.336
Fandiño B, Pautasso AA (2013) Distribución, historia natural y conservación de Harpyhaliaetus coronatus (Aves: Accipitridae) en el centro-este de Argentina. Natura Neotropicalis 1: 41-55
Gallego D, Sarasola JH (2022) Primer registro de reproducción exitosa del Águila Coronada o Águila del Chaco (Buteogallus coronatus) en la Provincia de San Luis, Argentina. Nuestras Aves 67: 40-45. https://doi.org/10.56178/na.vi67.4
Gallego D, Sarasola JH (2023) Unusual aggregations of immature Chaco eagles (Buteogallus coronatus) in northern Argentina. Ornithology Research 31: 294-297. https://doi.org/10.1007/s43388-023-00144-2
Gallego-García D, Sarasola JH (2024) Water canals may promote large-scale defaunation of the Gran Chaco. Biological Conservation 296: 110714. https://doi.org/10.1016/j.biocon.2024.110714
Galmes MA, Sarasola JH, Grande JM, Vargas FH (2018) Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina. Bird Conservation International 28: 403-415. https://doi.org/10.1017/S0959270917000272
Gienapp P, Väisänen RA, Brommer JE (2010) Latitudinal variation in breeding time reaction norms in a passerine bird. Journal of Animal Ecology 79: 836-842. https://doi.org/10.1111/j.1365-2656.2010.01693.x
Lack D (1950) The breeding seasons of European birds. Ibis 92: 288–316. https://doi.org/10.1111/j.1474-919X.1950.tb01753.x
Lobos RP, Santander FJ, Orellana SA, Ramírez PA, Muñoz L, Bellón DF (2011) Diet of the Crowned Eagle (Harpyhaliaetus coronatus) during the breeding season in the Monte desert, Mendoza, Argentina. Journal of Raptor Research 45: 180-183. https://doi.org/10.3356/JRR-10-36.1
Merlino V, Gallego D (2021) Primera documentación de reproducción exitosa de Águila Coronada o Águila del Chaco (Buteogallus coronatus) en la provincia de Santa Fe, Argentina. Nuestras Aves 66: 18-22. https://doi.org/10.56178/na.vi66.45. https://doi.org/10.56178/na.vi66.45
de la Peña MR (2025) Aves Argentinas: Descripción, comportamiento, reproducción y distribución. Tomo 7: Cathartidae, Pandionidae, Accipitridae, Tytonidae, Strigidae, Trogonidae, Alcedinidae, Momotidae, Galbulidae, Bucconidae, Ramphastidae, Picidae, Cariamidae, Falconidae, Psittacidae, Thamnophilidae, Melanopareiidae, Conopophacidae, Grallariidae, Rhinocryptidae, Formicariidae. Comunicaciones del Museo Provincial de Ciencias Naturales Florentino Ameghino (Nueva Serie), Santa Fe
Romero-Muñoz A, Fandos G, Benítez-López A, Kuemmerle T (2020a) Habitat destructions and overexploitation drive widespread declines in all facets of mammalian diversity in the Gran Chaco. Global Change Biology 27: 755–767. https://doi.org/10.1111/gcb.15418
Romero-Muñoz A, Benítez-López A, Zurell D, Baumann M, Camino M, Decarre J, del Castillo H, Giordano AJ, Gómez-Valencia B, Levers C, Noss AJ, Quiroga V, Thompson JJ, Torres H, Velilla M, Weiler A, Kuemmerle T (2020b) Increasing synergistic effects of habitat destruction and hunting on mammals over three decades in the Gran Chaco. Ecography 43: 954–966. https://doi.org/10.1111/ecog.05053
de la Sancha NU, Boyle SA, McIntyre NE, Brooks DM, Yanosky A, Cuellar Soto E, Mereles F, Camino M, Stevens RD (2021) The disappearing dry Chaco, one of the last dry forest systems on earth. Landscape Ecology 36: 2997–3012
Sarasola JH, Gallego D, Martínez-Miranzo B (2022) Chaco Eagle ecology and conservation. En: DellaSalla D, Goldstein MI (eds) Imperiled: The Encyclopedia of Conservation (Volume I). Elsevier, Amsterdam, pp 102-112. https://doi.org/10.1007/s10980-021-01291-x
Sarasola JH, Galmes MA, Watts BD (2020) Electrocution on Power Lines is an Important Threat for the Endangered Chaco Eagle (Buteogallus coronatus) in Argentina. Journal of Raptor Research 54(2) 166-171. https://doi.org/10.3356/0892-1016-54.2.166
Sarasola JH, Santillán MÁ, Galmes MA (2010) Crowned eagles rarely prey on livestock in central Argentina: persecution is not justified. Endangered Species Research 11: 207-213. https//doi.org/10.3354/esr00280
Semper-Pascual A, Macchi L, Sabatini FM, Decarre J, Baumann M, Blendinger PG, Gómez-Valencia B, Mastrangelo ME, Kuemmerle T (2018) Mapping extinction debt highlights conservation opportunities for birds and mammals in the south American Chaco. Journal of Applied Ecology 55: 1218–1229. https://doi.org/10.1111/1365-2664.13074
Torrella SA, Adámoli J (2006) Situación ambiental de la ecorregión del Chaco Seco. En: Brown A, Martinez Ortiz U, Acerbi M, Corcuera J (eds) La Situación Ambiental Argentina 2005. Fundación Vida Silvestre Argentina, Buenos Aires, pp 75-82

How to cite

Diego Gallego-García, Maximiliano Churruarin, Sergi Gómez-Espí, José H. Sarasola (2025). Successful breeding of a pair of Chaco Eagle (Buteogallus coronatus) in Santiago del Estero province, Argentina. Nuestras Aves, No. 70 (2025), 71-75. https://doi.org/10.56178/na.vi70.1076

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[1] Aparicio G, Lizzi J, Maturo H, Antoniazzi L (2008) La Reserva Natural El Mangrullo y su aporte para la conservación del Gran Chaco Americano. Informe técnico de la Fundación Hábitat y Desarrollo. Santa Fe, Argentina, pp 95

[2] Barbar F, Capdevielle A, Encabo M (2016) Direct persecution of Crowned Eagles (Buteogallus coronatus) in Argentina: a new call for their conservation. Journal of Raptor Research 50: 115-120. https://doi.org/10.3356/rapt-50-01-115-120.1

[3] Bellocq MI, Ramírez-Llorens P, Filloy J (2002) Recent records of crowned eagles (Harpyhaliaetus coronatus) from Argentina, 1981-2000. Journal of Raptor Research 36: 206-212

[4] BirdLife International (2024) Buteogallus coronatus. The IUCN Red List of Threatened Species 2024: e.T22695855A246532305. https://dx.doi.org/10.2305/IUCN.UK.2024-2.RLTS.T22695855A246532305.en. Accedido el 5/2/2025

[5] Burr ZM, Varpe Ø, Anker-Nilssen T, Erikstad KE, Descamps S, Barrett RT, Bech C, Christensen-Dalsgaard S, Lorentsen S-H, Moe B, Reiertsen TR, Strøm H (2016) Later at higher latitudes: Large-scale variability in seabird breeding timing and synchronicity. Ecosphere 7: e01283

[6] Coria OR, Gómez N, Heredia J, Quiroga O, Carrizo DA, Ruiz P, Herrera M, Rojas LM (2013) Nuevos aportes sobre la avifauna de la provincia de Santiago del Estero, Argentina. Nuestras Aves 58: 68-72. https://doi.org/10.56178/na.vi58.336

[7] Fandiño B, Pautasso AA (2013) Distribución, historia natural y conservación de Harpyhaliaetus coronatus (Aves: Accipitridae) en el centro-este de Argentina. Natura Neotropicalis 1: 41-55

[8] Gallego D, Sarasola JH (2022) Primer registro de reproducción exitosa del Águila Coronada o Águila del Chaco (Buteogallus coronatus) en la Provincia de San Luis, Argentina. Nuestras Aves 67: 40-45. https://doi.org/10.56178/na.vi67.4

[9] Gallego D, Sarasola JH (2023) Unusual aggregations of immature Chaco eagles (Buteogallus coronatus) in northern Argentina. Ornithology Research 31: 294-297. https://doi.org/10.1007/s43388-023-00144-2

[10] Gallego-García D, Sarasola JH (2024) Water canals may promote large-scale defaunation of the Gran Chaco. Biological Conservation 296: 110714. https://doi.org/10.1016/j.biocon.2024.110714

[11] Galmes MA, Sarasola JH, Grande JM, Vargas FH (2018) Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina. Bird Conservation International 28: 403-415. https://doi.org/10.1017/S0959270917000272

[12] Gienapp P, Väisänen RA, Brommer JE (2010) Latitudinal variation in breeding time reaction norms in a passerine bird. Journal of Animal Ecology 79: 836-842. https://doi.org/10.1111/j.1365-2656.2010.01693.x

[13] Lack D (1950) The breeding seasons of European birds. Ibis 92: 288–316. https://doi.org/10.1111/j.1474-919X.1950.tb01753.x

[14] Lobos RP, Santander FJ, Orellana SA, Ramírez PA, Muñoz L, Bellón DF (2011) Diet of the Crowned Eagle (Harpyhaliaetus coronatus) during the breeding season in the Monte desert, Mendoza, Argentina. Journal of Raptor Research 45: 180-183. https://doi.org/10.3356/JRR-10-36.1

[15] Merlino V, Gallego D (2021) Primera documentación de reproducción exitosa de Águila Coronada o Águila del Chaco (Buteogallus coronatus) en la provincia de Santa Fe, Argentina. Nuestras Aves 66: 18-22. https://doi.org/10.56178/na.vi66.45. https://doi.org/10.56178/na.vi66.45

[16] de la Peña MR (2025) Aves Argentinas: Descripción, comportamiento, reproducción y distribución. Tomo 7: Cathartidae, Pandionidae, Accipitridae, Tytonidae, Strigidae, Trogonidae, Alcedinidae, Momotidae, Galbulidae, Bucconidae, Ramphastidae, Picidae, Cariamidae, Falconidae, Psittacidae, Thamnophilidae, Melanopareiidae, Conopophacidae, Grallariidae, Rhinocryptidae, Formicariidae. Comunicaciones del Museo Provincial de Ciencias Naturales Florentino Ameghino (Nueva Serie), Santa Fe

[17] Romero-Muñoz A, Fandos G, Benítez-López A, Kuemmerle T (2020a) Habitat destructions and overexploitation drive widespread declines in all facets of mammalian diversity in the Gran Chaco. Global Change Biology 27: 755–767. https://doi.org/10.1111/gcb.15418

[18] Romero-Muñoz A, Benítez-López A, Zurell D, Baumann M, Camino M, Decarre J, del Castillo H, Giordano AJ, Gómez-Valencia B, Levers C, Noss AJ, Quiroga V, Thompson JJ, Torres H, Velilla M, Weiler A, Kuemmerle T (2020b) Increasing synergistic effects of habitat destruction and hunting on mammals over three decades in the Gran Chaco. Ecography 43: 954–966. https://doi.org/10.1111/ecog.05053

[19] de la Sancha NU, Boyle SA, McIntyre NE, Brooks DM, Yanosky A, Cuellar Soto E, Mereles F, Camino M, Stevens RD (2021) The disappearing dry Chaco, one of the last dry forest systems on earth. Landscape Ecology 36: 2997–3012

[20] Sarasola JH, Gallego D, Martínez-Miranzo B (2022) Chaco Eagle ecology and conservation. En: DellaSalla D, Goldstein MI (eds) Imperiled: The Encyclopedia of Conservation (Volume I). Elsevier, Amsterdam, pp 102-112. https://doi.org/10.1007/s10980-021-01291-x

[21] Sarasola JH, Galmes MA, Watts BD (2020) Electrocution on Power Lines is an Important Threat for the Endangered Chaco Eagle (Buteogallus coronatus) in Argentina. Journal of Raptor Research 54(2) 166-171. https://doi.org/10.3356/0892-1016-54.2.166

[22] Sarasola JH, Santillán MÁ, Galmes MA (2010) Crowned eagles rarely prey on livestock in central Argentina: persecution is not justified. Endangered Species Research 11: 207-213. https//doi.org/10.3354/esr00280

[23] Semper-Pascual A, Macchi L, Sabatini FM, Decarre J, Baumann M, Blendinger PG, Gómez-Valencia B, Mastrangelo ME, Kuemmerle T (2018) Mapping extinction debt highlights conservation opportunities for birds and mammals in the south American Chaco. Journal of Applied Ecology 55: 1218–1229. https://doi.org/10.1111/1365-2664.13074

[24] Torrella SA, Adámoli J (2006) Situación ambiental de la ecorregión del Chaco Seco. En: Brown A, Martinez Ortiz U, Acerbi M, Corcuera J (eds) La Situación Ambiental Argentina 2005. Fundación Vida Silvestre Argentina, Buenos Aires, pp 75-82