The hyacinth macaw is the longest parrot in the world, reaching roughly a metre from beak to tail tip, and is instantly recognised by its deep cobalt-blue plumage and vivid yellow facial markings. It lives in three main regions of central South America, where its survival is tightly linked to native palms and to old hardwood trees that provide nest cavities [Vilaça et al. 2024]. Once captured by the thousands for the international cage-bird trade, the species has shown a notable recovery in parts of its range thanks to decades of dedicated conservation work [Instituto Arara Azul 2024]. It is one of the most charismatic birds of the Pantanal, the world's largest tropical wetland.
Biology and Identification
The hyacinth macaw is the largest macaw and the longest parrot species, measuring about 100 cm in total length, the bulk of which is its long tail [BirdLife 2024]. Its plumage is a uniform deep cobalt blue, set off by a bright yellow ring of bare skin around the eye and a yellow patch at the base of the lower mandible [Vilaça et al. 2024]. The bill is large, strongly curved and powerful, an adaptation for cracking the extremely hard nuts that dominate its diet.
The species is a dietary specialist. It feeds chiefly on the nuts of native palms — in the Pantanal especially the acuri (Attalea phalerata) and bocaiúva (Acrocomia spp.) palms — and its enormous bill allows it to open shells that few other animals can [WCS Brasil 2024]. In some areas it takes nuts that have passed through cattle, which helps soften the husk. Hyacinth macaws are long-lived, slow-reproducing birds that form strong pair bonds and typically raise small clutches, a life-history pattern that makes recovery from population losses slow [USFWS 2018].
Habitat and Range
The hyacinth macaw occurs in three principal regions of central and eastern South America: the Pantanal wetlands of Mato Grosso and Mato Grosso do Sul in Brazil; the Cerrado savannas of states such as Goiás, Tocantins and western Bahia; and the southern Amazon region centred on southern Pará, with marginal populations extending toward eastern Bolivia and northeastern Paraguay [Vilaça et al. 2024]. It favours palm-rich savannas, gallery forests and seasonally flooded grasslands rather than dense, closed rainforest.
Nesting is a critical bottleneck. In the Pantanal the macaws depend heavily on cavities in old manduvi trees (Sterculia apetala); field studies of the region report that around 70% of nests are in manduvi trees that are over 80 years old, making suitable nest sites a limited and slowly renewed resource [WCS Brasil 2024].
Conservation Status
The hyacinth macaw is listed as Vulnerable on the IUCN Red List, assessed by BirdLife International [IUCN 2018]. The species had previously been classified in a more threatened category and was downlisted to Vulnerable in 2014 as evidence showed it had not declined as rapidly as once feared [IUCN 2018]. The global wild population is estimated at roughly 4,300 to 6,500 individuals, with the majority found in the Brazilian Pantanal [Vilaça et al. 2024]. Within Brazil it is treated as more imperilled, being classified as endangered on the Brazilian national Red List [Vilaça et al. 2024].
The species carries strong legal protection. It has been listed on Appendix I of CITES since 1987, which bans commercial international trade in wild-sourced birds [CITES 2025]. In the United States, the U.S. Fish and Wildlife Service listed the hyacinth macaw as a threatened species under the U.S. Endangered Species Act in a final rule effective September 2018, citing population declines from deforestation, hunting and predation [USFWS 2018].
Threats
The single most damaging historical pressure was illegal capture for the pet trade: an estimated 10,000 hyacinth macaws were taken from the wild during the 1980s, much of it driven by international demand for live birds [Vilaça et al. 2024]. Habitat loss and degradation remain central threats, as conversion of savanna and wetland for agriculture and cattle ranching reduces both feeding palms and nesting trees [USFWS 2018].
Two structural threats compound this. Cattle browse and trample young palms and manduvi seedlings, slowing the renewal of the very trees the macaws need for food and nesting [WCS Brasil 2024]. Because the species depends on very old hardwoods for nest cavities and reproduces slowly, the loss of mature trees to fire, wind or clearing directly limits breeding success [Vilaça et al. 2024]. Hunting and nest predation are additional documented pressures [USFWS 2018].
What Is Being Done
The best-known recovery effort is the Hyacinth Macaw Project (Projeto Arara Azul), begun in 1990 by biologist Neiva Guedes and now run through the Instituto Arara Azul, working in the Brazilian Pantanal [Instituto Arara Azul 2024]. Since 1992 the project has designed, tested and installed hundreds of artificial nests throughout the Pantanal to relieve the shortage of natural cavities [Instituto Arara Azul 2024]. Complementary habitat work focuses on protecting and cultivating acuri, bocaiúva and manduvi trees — including fencing young palms from livestock and preserving smaller trees that shelter old manduvis from wind [WCS Brasil 2024]. These combined measures are credited with a substantial local recovery, with roughly 5,000 birds now living in the Pantanal, the majority of the Brazilian population [Instituto Arara Azul 2024].
The work is supported and complemented by conservation organisations including the Wildlife Conservation Society in Brazil and the World Parrot Trust, which back field research, nest management, habitat protection and engagement with landowners and local communities [WCS Brasil 2024] [WPT 2024]. CITES Appendix I enforcement and national legislation in range states underpin these field efforts by limiting trade pressure [CITES 2025].
How You Can Help
The public can support hyacinth macaw recovery in honest, practical ways. Supporting established, transparent organisations with documented field programs — such as the Instituto Arara Azul, the World Parrot Trust and the Wildlife Conservation Society — helps fund nest management, habitat protection and monitoring [Instituto Arara Azul 2024] [WPT 2024]. Never buy a wild-caught parrot or any bird whose captive-bred origin and legal paperwork cannot be verified, since demand for wild birds historically drove the species' decline [Vilaça et al. 2024].
Travellers to the Pantanal can choose operators and lodges that participate in or contribute to macaw monitoring and habitat protection, which gives landowners an economic reason to conserve old nesting trees and palm groves [WCS Brasil 2024]. More broadly, supporting habitat protection in the Pantanal and Cerrado, and sharing accurate information about the species and its legal protections, helps sustain the conditions this slow-reproducing bird needs [USFWS 2018].
References
[BirdLife 2024] BirdLife International. (2024). Species factsheet: Anodorhynchus hyacinthinus (Hyacinth Macaw). BirdLife International DataZone. https://datazone.birdlife.org/species/factsheet/hyacinth-macaw-anodorhynchus-hyacinthinus
[CITES 2025] CITES. (2025). Appendices I, II and III. Convention on International Trade in Endangered Species of Wild Fauna and Flora. https://cites.org/eng/app/appendices.php
[Instituto Arara Azul 2024] Instituto Arara Azul. (2024). The Hyacinth Macaw Project (Projeto Arara Azul). Instituto Arara Azul, Campo Grande, Brazil. https://www.institutoararaazul.org.br/en/projects/the-hyacinth-macaw-project/
[IUCN 2018] BirdLife International. (2018). Anodorhynchus hyacinthinus. The IUCN Red List of Threatened Species 2018: e.T22685516A93077457. https://www.iucnredlist.org/species/22685516/93077457
[USFWS 2018] U.S. Fish and Wildlife Service. (2018). Endangered and Threatened Wildlife and Plants; Listing the Hyacinth Macaw; Final Rule. Federal Register 83(156): 40046–40067. https://www.federalregister.gov/documents/2018/08/13/2018-17319/endangered-and-threatened-wildlife-and-plants-listing-the-hyacinth-macaw
[Vilaça et al. 2024] Vilaça, S. T., et al. (2024). Prioritizing Conservation Areas for the Hyacinth Macaw (Anodorhynchus hyacinthinus) in Brazil From Low-Coverage Genomic Data. Evolutionary Applications, 17(11): e70039. https://doi.org/10.1111/eva.70039
[WCS Brasil 2024] Wildlife Conservation Society Brasil. (2024). Wildlife: Hyacinth Macaw. WCS Brasil. https://brasil.wcs.org/en-us/Wildlife/Hyacinth-Macaw.aspx
[WPT 2024] World Parrot Trust. (2024). Hyacinth Macaw Conservation. World Parrot Trust. https://www.parrots.org/projects/hyacinth-macaw